1 string did not use the translation, because the source file has changed text or coordinates

I'm new to Passolo so apologies in advance for my ignorance. I am using Passolo 2016 Team 5 Edition. I received a translation package where existing translations were updated. The package was done with an earlier version of Passolo, so when I opened it I was prompted to convert it to be compatible with my version. I am able to generate resx files for most of the translations, but one of the Czech files is giving me the error "1 string did not use the translation, because the source file has changed text or coordinates." In the resx file, this particular string is no longer translated even though the translation does appear in Passolo.