Flag the kanban containers for deletion or increase the no. of containers

What causes this issue?

You have reduced the number of kanban containers in the control cycle.
This is only possible if you first set the deletion indicator for the
surplus kanban containers.

System Response

How to fix this error?

To delete kanban containers, choose <PF>Display Kanbans</> to go to the
kanban screen and set the deletion indicator for the relevant kanban
containers.
If the system cannot delete enough kanban containers, you must lock the
kanban containers you want to delete. If these kanban containers are
given the status "EMPTY", replenishment is not triggered but the kanban
container is set to the status "WAIT". You can then delete the kanban
container.

Error message extract from SAP system. Copyright SAP SE.