Procurement Agreements, can a CPA have a different document number sequence from a BPA?

Summary:

I am new to Cloud and I was told by the implementation team that Purchase Agreements can only have one document numbering sequence. Is that true? How do you differentiate a CPA number from a BPA number if there is only one sequence?

Content (required):

The number sequence now says BPAXXX if it is either a BPA or CPA - very confusing

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