BIGINT UNSIGNED VALUE IS out of range My SQL

I had the same problem, it occurred on a JOIN and couldn't figure out what was going on, in the end it was typo in the ON clause where I placed a minus sign instead of an equal sign. Might be stupid but I just didn't see it for about 30 minutes and maybe this could help someone!!!

To generalise the rule, MySQL will now refuse to substract an UNSIGNED operand from a SIGNED one.

Example : SELECT A - B; will fail if A is SIGNED whereas B is UNSIGNED.

Workarounds: Add 1.0 factor to the signed operand, so it implicitly casts it to FLOAT, or use CAST (B AS SIGNED), or even swap (B - A) and change the algorithm accordingly.

Please read "Out-of-Range and Overflow Handling".
It says:

As of MySQL 5.5.5, overflow during numeric expression evaluation results in an error. For example, the largest signed BIGINT value is 9223372036854775807, so the following expression produces an error.

mysql> SELECT 9223372036854775807 + 1;

ERROR 1690 (22003): BIGINT value is out of range in '(9223372036854775807 + 1)'

To enable the operation to succeed in this case, convert the value to unsigned;

mysql> SELECT CAST(9223372036854775807 AS UNSIGNED) + 1;
+-------------------------------------------+
| CAST(9223372036854775807 AS UNSIGNED) + 1 |
+-------------------------------------------+
|                       9223372036854775808 |
+-------------------------------------------+

A change to part of your query, as following, would solve the issue.

( CAST( quantity AS SIGNED ) - COUNT( game_moblist.spawn_id ) ) AS quantity_to_spawn

Otherwise you may require to change the sql_mode on unsigned operations.

mysql> SET sql_mode = 'NO_UNSIGNED_SUBTRACTION';

and then run your query to get desired output.

See also a similar posting answered on a forum here.