Tricky case.
It seems that the tables are edited by spreadsheet. And also the part is flagged as a custom symbol. ( i run 8.5 so i cannot save it)
One should be able right click the table and select "Edit without spreadsheet" to get rid of the spredsheet connection.
Then I can only close/ save through using "Finish Custom Symbol Edit".
If you can fix the part by the above, Good. Else it's probably a case for Gtac.
Regards,
Tomas