Field help (LOTMGTCOD) 

Use this field to specify if this product is managed by lot. A lot number will differentiate stock lines.

SEEREFERTTO Stock lines

This product can also be managed with sublots, which are subdivisions of a lot. A sublot number will also differentiate stock lines. Sublot numbers are free-format (a number or group of 5-characters, by default, with the first sublot upon receipt of stock receipt suggested as 00001).

Define the lot management method for this product, as follows:

This value can only be changed if this product has no stock.