Hi Smedvid,
First I want to tell you that try to decompile your DB and then try again.
also make sure that you are not trying to access the data or records that is locked for updating.
the another thing you can try that just copy your table structure to new table.
and again try to link it with MySQL and try to run it.
As you had mentioned that you can add but not able to update so I think that it is related with locked record.
so you can try to set RecordLocks Property.
RecordLocks Property
Form.RecordLocks Property (Access)
Regards
Deepak
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