Different payment plan categories in the contracts for account &1

What causes this issue?

<DS:GLOS.CE3D29A77D72D411BA570800060D888B>payment plan category</> &V3&
is allocated to contract &V2& of contract account &V1&. A different
payment plan category (&V4&) is entered in the other contracts of this
contract account that are to be invoiced jointly, however, these are
based on different <DS:GLOS.AC4825FB7773D411A4950060B03C3B0E>payment
plan types</>

System Response

Because a single payment plan type must be used for all contracts that
are to be invoiced jointly, invoicing of this contract account is
cancelled for this invoicing unit.

How to fix this error?

Maintain the concerned contracts accordingly.
To find out which types the payment plan categories are based on,
choose the following path in Customizing for invoicing: <LS>Budget
billing plan -> Payment plan -> Define payment plan categories
(AMB/BBP) for USA and Canada</>.

Error message extract from SAP system. Copyright SAP SE.