Problems usign Loco Translate

Hello,
When I activate translatepress in my web, the words of theme I’m using and I had translated with loco tranlate (in this case Spanish) are automatically changed, and I try to change it with loco translate or poedit, it doesn’t change, unless I deactivate translatepress.

Why this error? How can I solve it?

I hope you can help me!

Thank you very much!