Why can't I book an existing item?

Ist der Artikel zum Verkauf freigegeben
Some items are only purchasing or production items and may not be sold alone. This is decided by assigning them to a certain item group.

Assign the item to another item group or change the item group properties at  Administration >  Settings >  Item (only with administrative rights).

Ist der Artikel für den gewählten Betrieb freigegeben
With the "Multi-Companies" module, individual items can be assigned to one or more farms.

Assign the item to the desired farm via Assign farm in the horizontal toolbar of the item.

Ist der Artikel aktiv
Once created, items cannot be deleted in Bp Event. To remove them from the normal search and not make them "bookable", they are marked as  not active in the horizontal toolbar of the item.

Set the item back to  active.