Error during changing material type using MMAM

Hi All,

There was a requirement to change from finished goods to trading goods, as the materials were newely created.It got changed with the T-code MMAM, the error which I am facing is now, when I am trying change anything in the said material master, the system is giving error

' Message no. MG144 :

The field Moving price is defined as a required field; it does not contain an entry '

Please note that even when I put a value in Moving price, this error is coming.

Note :

Finished goods are maintained at Standard price

Trading goods are maintained at Moving average price.

Kindly help.

Regards,

Harsh