Muti operators in club station and in portable

[F6AUE]

Hello
We use SwissLog in our club station F8KLY. We have created a QTH F8KLY/P, and when we are in portable trafic we use the call sign F8KLY/P. Depending on the day, we may have different operators call signs. 
If we change the operator's call sign, all previous QSOs with the call sign F8KLY/P will be modified with the latest operator call sign and name. Is there a solution that allows the old call signs to retain the old operators, in order to avoid creating a large number of portable QTHs? I haven't been able to find a solution, so thank you for your advice.

73's René