Hello MIK APO,
As far as I remember, that column of "Base UOM" is always Grayed Out and it gets the value same as Base UoM from Header of Product Master.
Please see if there is better Base UoM which can be maintained for this Product. If Business likes to deal with UoM = RC or KT, then it makes sense to use either of those as Base UoM instead of LBS. Please check on this.
Hope this will help.
Thank you
Satish Waghmare