Can not update project due to error 'Wrong structure type provided'

Hello,

I need your help!

I can not update project data via API PA_PROJECT_PUB.UPDATE_PROJECT, due to following error.

[[ Error ]]

Message : PA PA_PS_WP_NOT_SEP_FN_AMG
error message: Wrong structure type provided. Either the Workplan structure does not exist for this project.

My project uses Shared structure between FP and WP, and i give following parameters to run it.

[[ Parameters ]]

  l_structure_in_rec.pa_project_id          := ln_project_id;
  l_structure_in_rec.structure_type         := 'WORKPLAN';
  l_structure_in_rec.structure_version_name := 'Copy: AKO_ProTem_AO1';
  l_structure_in_rec.structure_version_id   := 36299;