The message is because you had something like a symbol placed offset to a dimension, and the dimension has since been deleted in the solid. This could be because a user retrieved the solid and deleted a lot of stuff, but is more likely that there was some user error in managing the versions of the solid, for example:
1) User A builds drawing D from P.PRT.4
2) User B deletes P.PRT.4 and .3, and redoes the development of the part from P.PRT.2
3) User A retrieves D, and D is trying to show things that don't make sense, like dimensions that 'have never been created'
The right answer is either do not roll back models that other models are using, move forward instead by deleting the new features you no longer want, *or* also roll back the models that reference and depend on this one.
