Cannot load netatalk

Error #4000:
exception 'OMVException' with message 'Failed to execute command 'export LANG=C; invoke-rc.d 'netatalk' start 2>&1': Starting Netatalk services (this will take a while):  cnid_metadcnid_metad is already running (pid = 2670), or the lock file is stale.
invoke-rc.d: initscript netatalk, action "start" failed.' in /usr/share/php/openmediavault/initscript.inc:169
Stack trace:
#0 /usr/share/php/openmediavault/initscript.inc(141): OMVSysVInitScript->invoke('start')
#1 /usr/share/php/openmediavault/initscript.inc(61): OMVSysVInitScript->start()
#2 /usr/share/openmediavault/engined/module/afp.inc(94): OMVSysVInitScript->exec()
#3 /usr/share/openmediavault/engined/rpc/config.inc(183): OMVModuleAFP->startService()
#4 [internal function]: OMVRpcServiceConfig->applyChanges(Array, Array)
#5 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array)
#6 /usr/share/openmediavault/engined/rpc/config.inc(230): OMVRpcServiceAbstract->callMethod('applyChanges', Array, Array)
#7 [internal function]: OMVRpcServiceConfig->applyChangesBg(Array, Array)
#8 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array)
#9 /usr/share/php/openmediavault/rpc.inc(62): OMVRpcServiceAbstract->callMethod('applyChangesBg', Array, Array)
#10 /usr/sbin/omv-engined(495): OMVRpc::exec('Config', 'applyChangesBg', Array, Array, 1)
#11 {main}