Error Message LB261 - Material Master Data Error (?) Message

[Foliviero]

Hi all ,

we are doing an upgrade from version 1909 to 2023 .
During our test we are facing a strange error (?) in the system.

In MM02 for some materials we have two different and alternative unit of measure (MASS - KG and  G) because we are manaing a conversion between KG and Meters in Proport. Unit of Measure

During an update for this material i'm facing this error and system don't give me the possibility to do anything else:

We need the conversion and the units of measure in the tab. Alternative unit of measure for business requirements.
Did you face already this error? How can we manage it?
Thanks