RRC rejection due to congestion

HI Experts ,

I have huge number of RRC rejection in this counter : VS.RRC.FailConnEstab.Cong specialy in this subcounters:
Somme de VS.RRC.Rej.ULPower.Cong
Somme de VS.RRC.Rej.DLPower.Cong
Somme de VS.RRC.Rej.ULCE.Cong
Somme de VS.RRC.Rej.DLCE.Cong
Somme de VS.RRC.Rej.Code.Cong
Somme de VS.RRC.Rej.Other.Cong(times)

this degredation Impacted CSSR PS ?
any Solution Root cause to follow plz