Why does Fishbowl say "Credit item types must have a negative total cost."?

Fishbowl requires credit items (inventory reductions) to have a negative cost value. You likely set the cost as positive when Fishbowl expects it to be negative.

Fishbowl: Credit item types must have a negative cost

What it means

Credit items typically represent inventory reductions or credits. Fishbowl enforces negative cost values for these items to maintain consistency: positive values represent increases, negative values represent decreases or write-offs. If you’re seeing this error, you probably entered a positive number in a cost field for a credit-type item.

What to check

Verify the item is classified as a credit type (check the item type designation or flag)
Review the total cost or unit cost field: it should show a negative value, like -10.00
If you see a positive number, try entering it as negative (with a minus sign) and save
Check if the item has related cost records that also need negative values