SAP Message AD146 - Table & is check table in &-&

Diagnosis
The table you wish to delete is used as a check table in the specifiedtable field. This means that a foreign key pointing to the table youare trying to delete was defined for the table field. As a result, youcannot delete the table.

System Response
The delete request was rejected.

Procedure
If you still want to delete the table, you must delete theforeign key pointing to the table from the specified table field. Onceyou have done this, you will be able to delete the table.