DRB.Add higher than SgNB.Add in NsaDc

Hi All,
I noted that N.NsaDc.DRB.Add.Succ is a little bigger than N.NsaDc.SgNB.Add.Succ.
What’s the explanation for that?
Vendor is Huawei.

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This is because an UE can have more DRB at a time.