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mysql> select guid from creature where id=21898;
+-------+
| guid  |
+-------+
| 76616 |
| 76617 |
| 76618 |
| 76619 |
+-------+
4 rows in set (0.02 sec)

mysql> select guid from creature where id=21899;
+-------+
| guid  |
+-------+
| 76620 |
| 76621 |
| 76622 |
| 76623 |
+-------+
4 rows in set (0.00 sec)