Problems saving sdlxliff file

Good morning,

We are translating a very big and urgent project and the translator has a problem.

He suddenly can't save an sdlxliff file and he doesn't dare to close Studio because he's afraid he would lose the translation.

When he tries to save the sdlxliff file, he gets this error message:

"Internal error: Multiple tags with the same ID "Bold" have different start tag properties."

Could you please advise asap because we have a very tight deadline?

Thank you so much for your help!

Kind regards