[relay_server::actors::events] ERROR: failed to store session: invalid type: map, expected a string at line 1 column 187

The following error is occurring in the relay
We are using the 20.11.0 sentry version. Envelope and performance monitoring functions are used.

“[relay_server::actors::events] ERROR: failed to store session: invalid type: map, expected a string at line 1 column 187”

The error log is constantly being printed. Despite the relay error log, the service itself works fine. But is there a possibility that this problem generates excessive redis keys?

Pinging @jauer and @untitaker for an answer

It’s not possible that this creates extra redis keys. Which SDK is this?