BIGINT UNSIGNED VALUE IS out of range My SQL

Question

I\'m getting the following error

#1690 - BIGINT UNSIGNED value is out of range in \'(legends.spawns.quantity -

Answer 1

I had similar problem, This error also come if our column have 0 value and we try to update it with -1 value.

In my case MySQL query were Failing if column1 is already have value 0, i.e column1 = 0

For example:

UPDATE `table1` SET `column1` = `column1` - 1 WHERE `column2` = XYZ

This give error

BIGINT UNSIGNED value is out of range in ....

To counter this problem

UPDATE `table1`
SET `column1` = (
    CASE WHEN `column1` < 1
    THEN 0
    ELSE (`column1` - 1)
end)
WHERE `column2` = 1
LIMIT 1