Unknown error

[TomBombadil711]

I am in turn 6 of a MP game vs russo (Toxic Struggle). When I finished my turn and the game should be uploaded an error message occurred after a while:

Unknown error occurred (code=41).

After re-starting the game I was able to play my turn and uploading went well.

[zakblood]

server reset maybe?

Error code: 41

MAPPING_FOR_SEQUENCE_NUMBER_FIELD

Cause: A non-read-only mapping is not defined for the sequence number field. A mapping is required so that TopLink can put and extract values for the primary key.

Action: Define a mapping.