Error installing 4.2 application in 18.1

During install of a 4.2 application into a 18.1 workspace I am getting the following error.

Parse error in line 26345/19: got "begin wwv_flow_api.set_region_column_width (

  p_id=>5332905065780235 + wwv_flow_api.g_id_offset,

  p_flow_id=>wwv_flow.g_flow_id,

  p_page_id=>350,

  p_plug_column_width=>'width="80%"'); end;", expected WHITELISTED_EXECUTE_IMMEDIATE_EXPRESSION

If I comment out this section in the application export file the application will install as expected in the 18.1 workspace.

Just curious if anyone else has seen this and/or is this a known issue?