Factory calendar & does not exist

What causes this issue?

The system has attempted to check the specified delivery date against
the <GL:factory_calendar>factory calender</> of the relevant
<GL:plant>plant</>. However, it was unable to find a factory calendar
for the plant.

How to fix this error?

Determine whether factory calendar &V1& is valid.
If necessary, contact your system administrator. The latter can assign
a factory calendar to the plant.
IF &DEVICE& = 'SCREEN'
<DS:SIMG.SIMG_CFMENUSAPCOX10>Define, copy, delete, check plant</>
ENDIF

Error message extract from SAP system. Copyright SAP SE.