F5 LTM 11.5 : SYNC FAILED after applying iapps

Hi everyone, I own active/passive LTM 3900 with 11.5.1 HF4 and I went through the same error ... Except that I never ever used iApp features ... It's not only about Synchronisation, this also happens on the passive device :

[root@eu-dcc-f5i02:Standby:Sync Failed] config  tmsh save sys config
Saving running configuration...
  /config/bigip.conf
  /config/bigip_base.conf
  /config/bigip_user.conf
[root@eu-dcc-f5i02:Standby:Sync Failed] config  tmsh load sys config
Loading system configuration...
  /defaults/asm_base.conf
  /defaults/config_base.conf
  /defaults/low_profile_base.conf
  /defaults/low_security_base.conf
  /defaults/policy_base.conf
  /defaults/wam_base.conf
  /defaults/analytics_base.conf
  /defaults/apm_saml_base.conf
  /defaults/app_template_base.conf
  /defaults/classification_base.conf
  /defaults/daemon.conf
  /defaults/fullarmor_gpo_base.conf
  /defaults/profile_base.conf
  /defaults/sandbox_base.conf
  /defaults/security_base.conf
  /defaults/urldb_base.conf
  /usr/share/monitors/base_monitors.conf
Loading configuration...
  /config/bigip_base.conf
  /config/bigip_user.conf
  /config/bigip.conf
01070710:3: Can't save/checkpoint DB object, class:sflow_http_virtual_data_source status:13 - EdbCfgObj.cpp, line 127
Unexpected Error: Loading configuration process failed.

Loading configuration doesn't work at all either.

I opened a support case, I'll let you know what's next