ArcGIS Pro 2.6.8; Oracle 18c 10.7.1 EGDB
In the Fields View, when I try to delete a field in a locked table, I get this error message:

Most of the content in that error message is not useful. Users often don't notice the part at the end that says, "Table is already locked".
It would be better if the error messages simply stated that the "Table is locked."