You can try to synchronize.
You can make a small change in the table and try synchronizing.
You can copy it and try using the copy.
You can try converting it to the standard table and using it.
You can make a new table and try to delete the old one (of course, you have to do a synchronizing at every step).
It is useful to review the table fields (names etc). Using system commands as field name, character malfunctions and length can be problematic.
If you have a memo-type field(blob, image or something like that), you can delete it first and add it after trying the table.
