Solution : https://service.sap.com/sap/support/notes/1611721 (SAP Service marketplace login required)
Key words :
local class lcl_host method get_ccms_mtmcname, physical host names differs, landscape server information check, correct physical host, /1ags/aew_capaci___________060 line 686, wrong server context, /1ags/ahw_capacity_________017 line 733, /1ags/ahw_capacity_________017 line 832, /1ags/ahw_capacity_________017 line 15983, landscape server information