Core/Logging: delete old logs of the own realm only

(cherry picked from commit beedf737c815c1f946381904417471c42a21de76)

src/server/database/Database/Implementation/LoginDatabase.cpp

@@ -81,7 +81,7 @@ void LoginDatabaseConnection::DoPrepareStatements()
     PrepareStatement(LOGIN_UPD_LAST_ATTEMPT_IP, "UPDATE account SET last_attempt_ip = ? WHERE username = ?", CONNECTION_ASYNC);
     PrepareStatement(LOGIN_UPD_ACCOUNT_ONLINE, "UPDATE account SET online = 1 WHERE id = ?", CONNECTION_ASYNC);
     PrepareStatement(LOGIN_UPD_UPTIME_PLAYERS, "UPDATE uptime SET uptime = ?, maxplayers = ? WHERE realmid = ? AND starttime = ?", CONNECTION_ASYNC);
-    PrepareStatement(LOGIN_DEL_OLD_LOGS, "DELETE FROM logs WHERE (time + ?) < ?", CONNECTION_ASYNC);
+    PrepareStatement(LOGIN_DEL_OLD_LOGS, "DELETE FROM logs WHERE (time + ?) < ? AND realm = ?", CONNECTION_ASYNC);
     PrepareStatement(LOGIN_DEL_ACCOUNT_ACCESS, "DELETE FROM account_access WHERE id = ?", CONNECTION_ASYNC);
     PrepareStatement(LOGIN_DEL_ACCOUNT_ACCESS_BY_REALM, "DELETE FROM account_access WHERE id = ? AND (RealmID = ? OR RealmID = -1)", CONNECTION_ASYNC);
     PrepareStatement(LOGIN_INS_ACCOUNT_ACCESS, "INSERT INTO account_access (id,gmlevel,RealmID) VALUES (?, ?, ?)", CONNECTION_ASYNC);