Field help (ECCFLG) 

Management of versions is subject to the ECC - Product version management activity code.

During the lifetime of a product, some of its characteristics can be modified. These modifications can be tracked back by activating version management.
To use version management, the product must be managed in stock. Versions will then be active in Manufacturing functions. For the tracking of versions to be effectively managed at the stock level, the product must also be managed by lot (Lot management field (LOTMGTCOD) is set to Mandatory lot).

Version management can be initialized for the assigned product category then, provided the product has no stock, modified for individual products.
When this product is created, if management of versions is activated, a message is displayed to suggest automatic creation of the first major version of this product. This version is assigned a To be activated status. In order to use the version, its status must be modified.