Sorry Joan but there are much bigger problems with this family group than just a difference in dates.
Firstly Valeska von Kalundberg appears to have incorrect parents as her name in no way matches her fathers. I would recommend that she is detached from them and merged with the other wife of Sune Sverkersson, Unknown Kalundborg
Secondly the profile of her current father Volodar Glebovitj av Minsk, appears to have 3 other duplicate profiles that all need to be merged together.- Minsk-1, Of Minsk-2 and Duke of Minsk-2, though none of them have a correct LNAB. I'm also not sure where the exact dates currently on Glebovitj av Minsk come from and exact dates are pretty rare in the Rurikid princes, so they need to be investigated.
Thirdly the mother of Valeska von Kalundberg, Rikissa av Polen is also probably a duplicate and recognised as being married three times, but not to Volodar Glebovich.
So basically this family group needs to be split apart. I don't have time at the moment to do any of that, but hopefully someone from other projects may.