Haraka module error

I’m constantly getting this error in the log from the Haraka plugin:

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2021-05-20 22:16:55.488108500 [INFO] [-] [redis] connected to redis://127.0.0.1:6379
2021-05-20 22:17:02.184034500 [DEBUG] [-] [watch] psubscribed to result-*
2021-05-20 22:17:02.184391500 [ERROR] [-] [server] watch plugin ran callback multiple times - ignoring subsequent calls
2021-05-20 22:17:02.185009500 [ERROR] [-] [server] Error
2021-05-20 22:17:02.185019500 at callback (/usr/lib/node_modules/Haraka/plugins.js:483:34)
2021-05-20 22:17:02.185024500 at /usr/lib/node_modules/Haraka/node_modules/haraka-plugin-watch/index.js:273:5
2021-05-20 22:17:02.185028500 at RedisClient.<anonymous> (/usr/lib/node_modules/Haraka/node_modules/haraka-plugin-redis/index.js:183:13)
2021-05-20 22:17:02.185033500 at RedisClient.emit (events.js:314:20)
2021-05-20 22:17:02.185037500 at subscribe_unsubscribe (/usr/lib/node_modules/Haraka/node_modules/redis/index.js:671:14)
2021-05-20 22:17:02.185042500 at return_pub_sub (/usr/lib/node_modules/Haraka/node_modules/redis/index.js:729:9)
2021-05-20 22:17:02.185046500 at RedisClient.return_reply (/usr/lib/node_modules/Haraka/node_modules/redis/index.js:761:9)
2021-05-20 22:17:02.185051500 at JavascriptRedisParser.returnReply (/usr/lib/node_modules/Haraka/node_modules/redis/index.js:137:18)
2021-05-20 22:17:02.185055500 at JavascriptRedisParser.execute (/usr/lib/node_modules/Haraka/node_modules/redis-parser/lib/parser.js:544:14)
2021-05-20 22:17:02.185060500 at Socket.<anonymous> (/usr/lib/node_modules/Haraka/node_modules/redis/index.js:218:27)
2021-05-20 22:17:17.053066500 [INFO] [-] [limit] Disconnected from redis://127.0.0.1:6379/4

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It’s harmless it seems, but points to an either configuration error in the REDIS server, or to the javascript code.

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