Error message XLIFF validation error

Project disappeared from Project List but still in Projects Folder.

I clicked on the SDL XLIFF file in the projects folder but file did not open

Error message: XLIFF validation error:  The "value" start tag on line 3250 position 1563819 does not match the end tag of "v" Line 6250, position 1563844

Please help

I have modified the source segments while translating, so it would not be practical to create a new project and use the TM