According to your error message, I can't be certain if the number 38 relates to the Employee Sub-Group Grouping for Quota (V_503_E) or to the Personnel Sub-Area Grouping for Quotas (V_001P_I).
The number 01 seems to relate to Quota 01.
Please confirm that the employee belongs to a valid ESG and PSG.
Next, confirm that Quota 01 exists for that combination of ESG and PSG in table view V_T556A.