Changing date on PensionBee for net worth

Hello. I recently combined my pension into PensionBee. Now the date I did the merge has got an absolutely huge spike in the net worth diagram - is there or could there be a way to set a date on the pension to get rid of this spike in the graph? An accurate graph is really satisfying to look at.

Perhaps setting the pension date to be at the start of my transaction history would fix the visual spike.