Change attribute table from read only mode

[MAHDISaeediNik]

I want to transfer a row or rows to another attribute table. I know that I should use the join command, but the problem is that when I run the command, the error message Target *** is read-only appears. On the other hand, I cannot find the attribute table to change it from read-only mode. How do you think I can solve this problem?

[MAHDISaeediNik]

append command

[RobertBorchert]

How can you do the join if you don't know where the table is

In the destination table select Data Design > Fields >

make sure Read only is not checked. 

[MAHDISaeediNik]

Thank you for your reply.

But unfortunately, despite unchecking the "read only" mode, the error message is repeated.

[RobertBorchert]

is your table being pulled in from a  feature service?

[MAHDISaeediNik]

Yes. A KML file has been converted into a Layer. Is this important for future operations on the "attribute tables"?