diff --git a/misc/create_schema.sql b/misc/create_schema.sql
index adbe508..5f9764c 100644
--- a/misc/create_schema.sql
+++ b/misc/create_schema.sql
@@ -39,6 +39,25 @@ CREATE TABLE `berth` (
 ) ENGINE=InnoDB AUTO_INCREMENT=195 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='Berth of ship for a ship call';
 /*!40101 SET character_set_client = @saved_cs_client */;
 
+CREATE TABLE `history` (
+  `id` int unsigned NOT NULL AUTO_INCREMENT,
+  `participant_id` int unsigned NOT NULL,
+  `user_id` int unsigned DEFAULT NULL,
+  `shipcall_id` int unsigned NOT NULL,
+  `timestamp` datetime NOT NULL COMMENT 'Time of saving',
+  `eta` datetime DEFAULT NULL COMMENT 'Current ETA / ETD value (depends if shipcall or times were saved)',
+  `type` int NOT NULL COMMENT 'shipcall or times',
+  `operation` int NOT NULL COMMENT 'insert, update or delete',
+  PRIMARY KEY (`id`),
+  KEY `FK_HISTORY_PARTICIPANT_idx` (`participant_id`),
+  KEY `FK_HISTORY_SHIPCALL_idx` (`shipcall_id`),
+  KEY `FK_HISTORY_USER` (`user_id`),
+  CONSTRAINT `FK_HISTORY_PARTICIPANT` FOREIGN KEY (`participant_id`) REFERENCES `participant` (`id`),
+  CONSTRAINT `FK_HISTORY_SHIPCALL` FOREIGN KEY (`shipcall_id`) REFERENCES `shipcall` (`id`),
+  CONSTRAINT `FK_HISTORY_USER` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`)
+) ENGINE=InnoDB AUTO_INCREMENT=29292 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='This table stores a history of changes made to shipcalls so that everyone can see who changed what and when';
+
+
 --
 -- Table structure for table `notification`
 --
diff --git a/src/RoleEditor/App.config b/src/RoleEditor/App.config
index bd2b4e4..2ba1186 100644
--- a/src/RoleEditor/App.config
+++ b/src/RoleEditor/App.config
@@ -8,7 +8,7 @@
     <applicationSettings>
         <RoleEditor.Properties.Settings>
             <setting name="ConnectionString" serializeAs="String">
-                <value>Server=localhost;User ID=ds;Password=HalloWach_2323XXL!!;Database=bremen_calling_test;Port=33306</value>
+                <value>Server=localhost;User ID=ds;Password=HalloWach_2323XXL!!;Database=bremen_calling_test;Port=33307</value>
             </setting>
         </RoleEditor.Properties.Settings>
     </applicationSettings>
diff --git a/src/RoleEditor/MainWindow.xaml b/src/RoleEditor/MainWindow.xaml
index 5dde421..76d287a 100644
--- a/src/RoleEditor/MainWindow.xaml
+++ b/src/RoleEditor/MainWindow.xaml
@@ -59,7 +59,7 @@
                             <Label Content="Street" Grid.Row="1" Grid.Column="1" HorizontalAlignment="Right"/>
                             <Label Content="Postal code" Grid.Row="2" Grid.Column="1" HorizontalAlignment="Right"/>
                             <Label Content="City" Grid.Row="3" Grid.Column="1" HorizontalAlignment="Right"/>
-                            <Label Content="Active" Grid.Row="4" Grid.Column="1" HorizontalAlignment="Right"/>
+                            <Label Content="Deleted" Grid.Row="4" Grid.Column="1" HorizontalAlignment="Right"/>
                             <Label Content="Type" Grid.Row="5" Grid.Column="1" HorizontalAlignment="Right"/>
                             <Label Content="Created" Grid.Row="6" Grid.Column="1" HorizontalAlignment="Right"/>
                             <Label Content="Modified" Grid.Row="7" Grid.Column="1" HorizontalAlignment="Right"/>
@@ -67,7 +67,7 @@
                             <TextBox x:Name="textBoxParticipantStreet" Grid.Row="1" Grid.Column="2" Margin="2" VerticalContentAlignment="Center" />
                             <TextBox x:Name="textBoxParticipantPostalCode" Grid.Row="2" Grid.Column="2" Margin="2" VerticalContentAlignment="Center" />
                             <TextBox x:Name="textBoxParticipantCity" Grid.Row="3" Grid.Column="2" Margin="2" VerticalContentAlignment="Center" />
-                            <CheckBox x:Name="checkboxParticipantActive" Grid.Row="4" Grid.Column="2" VerticalAlignment="Center" />
+                            <CheckBox x:Name="checkboxParticipantDeleted" Grid.Row="4" Grid.Column="2" VerticalAlignment="Center" IsEnabled="False" />
                             <xctk:CheckComboBox x:Name="comboBoxParticipantType" Grid.Row="5" Grid.Column="2" Margin="2" SelectedValue="Key" DisplayMemberPath="Value" />
                             <TextBox x:Name="textBoxParticipantCreated" Grid.Row="6" IsReadOnly="True" IsEnabled="False" Grid.Column="2" Margin="2" VerticalContentAlignment="Center" />
                             <StackPanel Orientation="Horizontal" Grid.Row="7" Grid.Column="0">
@@ -167,7 +167,7 @@
                             </Grid.ColumnDefinitions>
                             <ListBox x:Name="listBoxUser" Margin="2" Grid.RowSpan="9" SelectionChanged="listBoxUser_SelectionChanged">
                                 <ListBox.ContextMenu>
-                                    <ContextMenu>
+                                    <ContextMenu Name="contextMenuUser">
                                         <MenuItem x:Name="menuItemNewUser" Header="New.." Click="menuItemNewUser_Click">
                                             <MenuItem.Icon>
                                                 <Image Source="Resources/add.png" />
diff --git a/src/RoleEditor/MainWindow.xaml.cs b/src/RoleEditor/MainWindow.xaml.cs
index dc04e09..0ec1f00 100644
--- a/src/RoleEditor/MainWindow.xaml.cs
+++ b/src/RoleEditor/MainWindow.xaml.cs
@@ -61,6 +61,8 @@ namespace RoleEditor
 
                 // load all participants
                 List<Participant> participants = await Participant.LoadAll(_dbManager);
+                participants.Sort((x, y) => string.Compare(x.Name, y.Name));
+
                 foreach (Participant p in participants)
                 {
                     _participants.Add(p);
@@ -464,9 +466,9 @@ namespace RoleEditor
             this.textBoxParticipantName.Text = (p != null) ? p.Name : string.Empty;
             this.textBoxParticipantStreet.Text = (p != null) ? p.Street : string.Empty;
             this.textBoxParticipantPostalCode.Text = (p != null) ? p.PostalCode : string.Empty;
-            this.textBoxParticipantCity.Text = (p != null) ? p.City : string.Empty;
-            //  this.checkboxParticipantActive.Checked = (p != null) ? p.
+            this.textBoxParticipantCity.Text = (p != null) ? p.City : string.Empty;            
             this.textBoxParticipantCreated.Text = (p != null) ? p.Created.ToString() : string.Empty;
+            this.checkboxParticipantDeleted.IsChecked = (p != null) ? p.Deleted : null;
             this.textBoxParticipantModified.Text = (p != null) ? p.Modified.ToString() : string.Empty;
             this.checkBoxParticipantAllowBSMD.IsChecked = (p != null) ? p.IsFlagSet(Participant.ParticipantFlags.ALLOW_BSMD) : null;
             this.comboBoxParticipantType.SelectedItems.Clear();
@@ -510,6 +512,11 @@ namespace RoleEditor
                     _assignedPorts.Add(pa);
                 }
             }
+
+            this.contextMenuUser.IsEnabled = !p.Deleted;
+            this.buttonAddPortAssignment.IsEnabled = !p.Deleted;
+            this.buttonRemovePortAssignment.IsEnabled = !p.Deleted;
+
         }
 
         private async void listBoxRoles_SelectionChanged(object sender, SelectionChangedEventArgs e)
@@ -594,7 +601,7 @@ namespace RoleEditor
                 if(this.listBoxParticipant.SelectedItem is Participant p)
                 {
                     await p.Delete(_dbManager);
-                    this._participants.Remove(p);
+                    p.Deleted = true;
                 }
             }
             catch (Exception ex)
@@ -628,6 +635,7 @@ namespace RoleEditor
             {
                 if (this.listBoxUser.SelectedItem is User u)
                 {
+                    await u.ExecuteNonQuery(_dbManager); // extra history delete happens here
                     await u.Delete(_dbManager);
                     this._users.Remove(u);
                 }
diff --git a/src/RoleEditor/RoleEditor.csproj b/src/RoleEditor/RoleEditor.csproj
index 8e06592..56aad0c 100644
--- a/src/RoleEditor/RoleEditor.csproj
+++ b/src/RoleEditor/RoleEditor.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net6.0-windows</TargetFramework>
+    <TargetFramework>net8.0-windows7.0</TargetFramework>
     <Nullable>enable</Nullable>
     <UseWPF>true</UseWPF>
     <ApplicationIcon>Resources\lock_preferences.ico</ApplicationIcon>
@@ -30,8 +30,8 @@
 
   <ItemGroup>
     <PackageReference Include="BCrypt.Net-Next" Version="4.0.3" />
-    <PackageReference Include="ExcelDataReader" Version="3.7.0-develop00385" />
-    <PackageReference Include="Extended.Wpf.Toolkit" Version="4.5.0" />
+    <PackageReference Include="ExcelDataReader" Version="3.8.0" />
+    <PackageReference Include="Extended.Wpf.Toolkit" Version="5.0.0" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/brecal.model/DbEntity.cs b/src/brecal.model/DbEntity.cs
index e341bf7..9e62b37 100644
--- a/src/brecal.model/DbEntity.cs
+++ b/src/brecal.model/DbEntity.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Data;
-using System.Linq;
-using System.Text;
+using System.Data;
 using System.Threading.Tasks;
 
 namespace brecal.model
@@ -42,6 +38,11 @@ namespace brecal.model
         /// <param name="cmd">CMD created by DB manager</param>
         public abstract void SetDelete(IDbCommand cmd);
 
+        public virtual void SetNonQuery(IDbCommand cmd)
+        {
+            // default: do nothing
+        }
+
         /// <summary>
         /// Each database entity must be able to save itself to the database
         /// </summary>
@@ -61,9 +62,14 @@ namespace brecal.model
         /// Each entity must be able to delete itself
         /// </summary>
         public async Task Delete(IDBManager manager)
-        {
+        {            
             await manager.ExecuteNonQuery(this.SetDelete);
         }
 
+        public async Task ExecuteNonQuery(IDBManager manager)
+        {
+            await manager.ExecuteNonQuery(this.SetNonQuery);
+        }
+
     }
 }
diff --git a/src/brecal.model/Participant.cs b/src/brecal.model/Participant.cs
index cc15705..fa01045 100644
--- a/src/brecal.model/Participant.cs
+++ b/src/brecal.model/Participant.cs
@@ -55,6 +55,8 @@ namespace brecal.model
 
         public uint Flags { get; set; }
 
+        public bool Deleted { get; set; } = false;
+
         #endregion
 
         #region public static methods
@@ -83,6 +85,7 @@ namespace brecal.model
                 if (!reader.IsDBNull(6)) p.Flags = (uint)reader.GetInt32(6);
                 if (!reader.IsDBNull(7)) p.Created = reader.GetDateTime(7);
                 if (!reader.IsDBNull(8)) p.Modified = reader.GetDateTime(8);
+                if (!reader.IsDBNull(9)) p.Deleted = reader.GetBoolean(9);
                 result.Add(p);
             }
             return result;
@@ -90,7 +93,7 @@ namespace brecal.model
 
         public static void SetLoadQuery(IDbCommand cmd, params object?[] list)
         {
-            cmd.CommandText = "SELECT id, name, street, postal_code, city, type, flags, created, modified FROM participant";
+            cmd.CommandText = "SELECT id, name, street, postal_code, city, type, flags, created, modified, deleted FROM participant";
         }
 
         #endregion
@@ -111,13 +114,13 @@ namespace brecal.model
 
         public override void SetDelete(IDbCommand cmd)
         {
-            cmd.CommandText = "DELETE FROM participant WHERE id = @ID";
+            cmd.CommandText = "UPDATE participant SET deleted = 1 WHERE id = @ID";
 
             IDataParameter idParam = cmd.CreateParameter();
             idParam.ParameterName = "ID";
             idParam.Value = this.Id;
             cmd.Parameters.Add(idParam);
-        }
+        }        
 
         #endregion
 
diff --git a/src/brecal.model/User.cs b/src/brecal.model/User.cs
index 37111d5..6f172d5 100644
--- a/src/brecal.model/User.cs
+++ b/src/brecal.model/User.cs
@@ -101,6 +101,16 @@ namespace brecal.model
             return this.Username ?? $"{base.Id} - {this.GetType().Name}";
         }
 
+        public override void SetNonQuery(IDbCommand cmd)
+        {
+            cmd.CommandText = "UPDATE history set user_id = NULL WHERE user_id = @ID";
+
+            IDataParameter idParam = cmd.CreateParameter();
+            idParam.ParameterName = "ID";
+            idParam.Value = this.Id;
+            cmd.Parameters.Add(idParam);
+        }
+
         #endregion
 
         #region private methods
diff --git a/src/brecal.model/brecal.model.csproj b/src/brecal.model/brecal.model.csproj
index 132c02c..30402ac 100644
--- a/src/brecal.model/brecal.model.csproj
+++ b/src/brecal.model/brecal.model.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/src/brecal.mysql/brecal.mysql.csproj b/src/brecal.mysql/brecal.mysql.csproj
index 786b11e..3d452dc 100644
--- a/src/brecal.mysql/brecal.mysql.csproj
+++ b/src/brecal.mysql/brecal.mysql.csproj
@@ -1,13 +1,13 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MySqlConnector" Version="2.3.0-beta.1" />
+    <PackageReference Include="MySqlConnector" Version="2.4.0" />
   </ItemGroup>
 
   <ItemGroup>