Solution : https://service.sap.com/sap/support/notes/1635211 (SAP Service marketplace login required)
Key words : 
software component   sap_appl                      sap application, data element       mb_no045short description, system displays error message 045, stock management units, assigned support package, manual pre-implement, manual post-implement, deactivating unrealistic prices, release 600          sapkh60001 - sapkh60020, release 604          sapkh60401 - sapkh60410
Related Notes : 
       
| 1026379 | MB5K: Misleading error message 045 due to rounding |