IF function gives a circle reference

Hi dear forum

I´m working on a IF formula where if H9 is negative i.e < 0 then

H9=0

otherwise

H9=(D4+D5+D6+D7+D8)-C27-C32-C28

but i keep geeting error message

=IF(H9 < 0;0;"=(D4+D5+D6+D7[+D8)-C27-C32-C28")

Quote

one or more circular references where a formula refers to its own cell either directly or indirectly. this might cause these to calculate incorrectly

Please help me solve this issue.
Any help will be appriciated

With Regards

Peter, from Sweden

Thx!