Error: Cache snapshot does not exist

I started to receive this messages in the genieacs log.

May 07 15:36:19 acs1 genieacs-cwmp[18074]: 2021-05-07T13:36:19.256Z [ERROR] Uncaught exception; pid=18097 exceptionName="Error" exceptionMessage="Cache snapshot does not exist" exceptionStack="Error: Cache snapshot does not exist
    at /usr/local/lib/nodejs/node-v12.18.3-linux-x64/lib/node_modules/genieacs/bin/genieacs-cwmp:2:105082
    -> /usr/local/lib/nodejs/node-v12.18.3-linux-x64/lib/node_modules/lib/local-cache.ts:524:24
    at Dn (/usr/local/lib/nodejs/node-v12.18.3-linux-x64/lib/node_modules/genieacs/bin/genieacs-cwmp:2:105144)
    -> /usr/local/lib/nodejs/node-v12.18.3-linux-x64/lib/node_modules/lib/cwmp.ts:78:38
    at Mn (/usr/local/lib/nodejs/node-v12.18.3-linux-x64/lib/node_modules/genieacs/bin/genieacs-cwmp:2:120485)
    -> /usr/local/lib/nodejs/node-v12.18.3-linux-x64/lib/node_modules/lib/cwmp.ts:1198:33
    at /usr/local/lib/nodejs/node-v12.18.3-linux-x64/lib/node_modules/genieacs/bin/genieacs-cwmp:2:132470
    -> /usr/local/lib/nodejs/node-v12.18.3-linux-x64/lib/node_modules/lib/cwmp.ts:1570:12
    at processTicksAndRejections (internal/process/task_queues.js:97:5)"
May 07 15:36:19 acs1 genieacs-cwmp[18074]: 2021-05-07T13:36:19.682Z [ERROR] Worker died; pid=18097 exitCode=0

I am running on version=“1.2.5+20210312233623”.

Unfortunatly I can not tell, when this appeared the first time.

How can I investigate this matter further?