SAP Message BS007 - "&" is not allowed (&)

Diagnosis
The current status of object '&V2&' prohibits business transaction '&V1&
' ('&V3&').

Procedure
To process business transaction '&V1&', you first have to change thestatus of object '&V2&' to allow the transaction '&V1&'.
PERFORM SET_PARAMETER_VNG IN PROGRAM RBSVINFV
USING &V3&
ENDPERFORM
This gives you an overview of the system and user statuses that affectthe transaction. A transaction can only be executed if there is at leastone status that allows it and there is no status that forbids it.
Transaction analysis

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350975ME22N: BS007 when changing the purchase order quantity
328378BS007: WBS element check despite being hidden
1644192Message Type 'BS' not returned from ERP for SC
142561System status I0235