Alpha Conversion Error while extracting NUMC Nodes- Cost Center Hierarchy

When I try to the extract for Cost center Hierarchy, it is failing only for NUMC nodes by giving the Alpha conversion errors.

For example, if I create a numeric group 57 on ECC side the extraction load is failing on BI side by giving the alpha conversion error. but if i create the group exactly as 10 Char long, 0000000057 on ECC, the extraction of the Cost center Hierarchy is sucessful to BI.

Can Please anyone help me resolve that issue, i cant able to find the solution why its the problem only for NUMC nodes.

Thanks