Can't edit/ delete a player when tag's are used. - CMS 1.8.13

Hi guys!

I’m with CMS 1.8.13
Windows Server
PHP 5.6 FastCGI

When I set a TAG in a PLAYER in the DISPLAYS menu, the CMS prevents me from deleting or editing the player. It also prevents me from removing the tag.

It’s show me an error mensage.

And this is the log:

Can u give some support?

Tks!!