Document number 5000000013 not within defined interval

Experts ,

When I am trying to create PO(ME21N),

System is showing the error

Document number 5000000011 not within defined interval

Message no. 06223

Diagnosis

The document number you entered does not lie within the interval defined for purchasing documents.

Procedure

Contact your system administrator if changes need to be made to the number range interval.

Help me to solve the issues

Regards