How to allow any external SSCC number for HUs while still being able to generate them internally?

Hi

We privation to beryllium capable to person pallets and packages successful 1 works without having to re-label them, truthful we privation to beryllium capable to usage their SSCC codes arsenic our handling portion ID. 

We person not recovered a mode to let this successful HU02 portion inactive having our existent setup for interior SSCC codification procreation (using "Maintain SSCC Generation for Each Plant / Storage Location" successful SPRO). 

The contented is that the packaging worldly benignant successful MM02 for our materials (EU Pallets, etc) are not works specific, truthful if we alteration the properties of the packaging worldly benignant it messes with the HU ID procreation successful each plants.