Solution : https://service.sap.com/sap/support/notes/216951 (SAP Service marketplace login required)
Key words : 
symptom error 045  incorrect price, 67the calculated price = total, calculated price differs, price times stock, 1 kggood receipt quantity = 0, calculated total, total quantity, standard price, actual price, price unit
Related Notes : 
       
| 1026379 | MB5K: Misleading error message 045 due to rounding | 
| 320989 | MB5K: Incorrect price because of rounding error |