Hello,
This is the modular strategy behaviour for Sales Contracts of benignant Quantity (CQ). For this benignant of contract, the 'Contract Release Control' tract of the corresponding point categories is acceptable arsenic 'A = Warning if people worth is exceeded'.
However, your request tin beryllium accomplished by utilizing the Sales Contract of benignant Value (VC01), which has the tract 'Contract Release Control' of the corresponding point categories is acceptable arsenic 'B = Error connection if people worth is exceeded'. If this benignant of declaration besides fits your concern needs, you tin usage it alternatively and past execute the desired strategy behavior.
You tin cheque much accusation astir Sales Contracts types connected the authoritative documentation: Sales Contracts | SAP Help Portal