Hi cseajs ,
The issue is likely due to unsupported or mismatched data types in those two specific tables; especially in primary keys or indexed columns. Even though the data is different, the table structure might include types like geometery, hierarchyid, or datetime2(7) that Fabric doesn't support well. Double-check the schema and data types across all three databases for those tables, clean up any null-only columns, and try syncing again.

Regards,
Mehrdad Abdollahi