ActiveRecord::ValueTooLong: PG::StringDataRightTruncation: ERROR: value too long for type character varying(255)

https://sentry.gitlab.net/gitlab/gitlabcom/issues/4104174/?referrer=gitlab_plugin

PG::StringDataRightTruncation: ERROR:  value too long for type character varying(255)

  lib/gitlab/database/load_balancing/connection_proxy.rb:121:in `public_send'
    connection.public_send(...)
  lib/gitlab/database/load_balancing/connection_proxy.rb:121:in `block in write_using_load_balancer'
    connection.public_send(...)
  lib/gitlab/database/load_balancing/load_balancer.rb:127:in `block in read_write'
    yield connection
  lib/gitlab/database/load_balancing/load_balancer.rb:205:in `retry_with_backoff'
    return yield attempt # Yield the current attempt count
  lib/gitlab/database/load_balancing/load_balancer.rb:116:in `read_write'
    retry_with_backoff(attempts: attempts) do |attempt|
...
(237 additional frame(s) were not displayed)

ActiveRecord::ValueTooLong: PG::StringDataRightTruncation: ERROR:  value too long for type character varying(255)