Failed to refresh session cache: ShardingStateNotInitialized: Cannot accept sharding commands if sharding state has not been initialized with a shardIdentity document

Ops and Admin Sharding
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Basic question in case you forgot. You did execute sh.enableSharding(dbname);
Can you try not using same names in replica set naming ? I am not that experienced in sharding tehniques and please understand that I am just trying to point out to some mistakes I’ve made to help you out :slight_smile:

Edit: You should provide information like MongoDB Version, and OS that you are using.