SQL error 1213 for Multi Proxies

[PanHaskins]

Proxies version:
Flamecord 1.5.9
BotSentry 9.5.3

Each Bungeecord has this bug at different times. None is the same.
No one even has to be on the server for it to do it.

Proxy Log 1:
[20:55:17 INFO]: (!) SQL error is 1213.
[20:56:17 INFO]: (!) SQL error is 1213.
[13:29:17 INFO]: (!) SQL error is 1213.
[13:30:17 INFO]: (!) SQL error is 1213.

Proxy Log 2:
[00:32:52 INFO]: (!) SQL error is 1213.
[00:33:53 INFO]: (!) SQL error is 1213.
[00:35:53 INFO]: (!) SQL error is 1213.
[03:03:28 INFO]: (!) SQL error is 1213.
[03:06:29 INFO]: (!) SQL error is 1213.

[Laurenshup]

This message is not displayed at the same time? What is your database setup?

[PanHaskins]

whitelist-database-sync:
  enabled: true
  cachetime: 120
  
mysql:
  settings:
    updateinterval: 60
  port: 3306
  username: "asfasafasf"
  database: "s1_databasename"
  password: "bestpasswordever"
  ip: "141.141.141.141"
  enabled: true

[Laurenshup]

Seems like the MySQL needs recoding in order to sync the servers with each other.

[Laurenshup]

Hmm, when investigating more, I am unsure if this is really is caused because of sync problems. Is this still happening, and can you tell me how the database looks like? This might be caused because of incorrect versions.