Error message when rearranging rows within table

Hello,

For work I have to sort a bunch of data and I'm constantly moving entire rows of data from one table to another (works fine) and within tables. Recently, I've been getting this error message when I try to move a row within the table it is already located in:

"You can't rearrange cells within a table this way, because it might affect other table cells in an unexpected way."

I've been doing this exact same task for five months now and I just suddenly started receiving this error message. Does anybody know what's causing it or how to fix it?

Thank you!
Zach