diff --git a/src/server/BreCal/database/enums.py b/src/server/BreCal/database/enums.py
index 7cab2d0..04516fc 100644
--- a/src/server/BreCal/database/enums.py
+++ b/src/server/BreCal/database/enums.py
@@ -11,10 +11,6 @@ class ParticipantType(IntFlag):
     PORT_ADMINISTRATION = 32
     TUG = 64
 
-    @classmethod
-    def _missing_(cls, value):
-        return cls.undefined
-
 class ShipcallType(IntEnum):
     """determines the type of a shipcall, as this changes the applicable validation rules"""
     undefined = 0
@@ -66,7 +62,3 @@ class ParticipantFlag(IntFlag):
     """
     undefined = 0
     BSMD = 1
-
-    @classmethod
-    def _missing_(cls, value):
-        return cls.undefined