The internal number already exists Message no. MM042

SAP MM ERROR TUTORIALS-

Common Error Message."The internal number already exists" in MM01 during the creation of a FERT (Finished Product) typically indicates that the material number you're trying to create already exists in the system. in SAP.....

FOLLOW STEPS-

Solution-TCODE -MMNR

The material type is set up for external number assignment in transaction MMNR (Maintain Number Ranges for Material).

Internal number assignment is try to creating a material of this type MM01

FOLLOW PATH-SPRO → Logistics → Materials Management → Material Master → Basic Settings → Maintain Number Ranges (MMNR)

Solution-TCODE -GO TO MMNR

SELECT -INTERVALS

SELECT -LICR-CHANGE NO RANGE-

-1)Reassign Number Range:- Adjust the number range if it has been exhausted or overlaps with another.

-2)Also Correct Material Number: Use a different material number if creating manually.

-Check Point