Material XXXX not converted for Material Ledger ; Message C+004

Hi

We are trying to do GR for one material and system is issuing Message C+004 saying that "Material is not converted for Material Ledger".

This material is a split valuation material and the price determination indicator for INTERNAL valuation is set as "3" with Standard Price control.

When I checked the material price analysis in ML, it shows that for few previous periods, the period status in the ML is shown without green indicator.

We have already closed the ML for period 04/2019.

How can we resolve this error now ?