Capstone project part 1 - terraform error for IAM role

I face a problem when I run

terraform apply

for the serving layer in step 4.3:

I got this error.
How to fix this ?

make sure you are implementing previous steps of 4.3 serving zone correctly, make sure you are completing the code correctly and if it still doesnt work you can delete the files of the lab and start over gain by clicking on update lab

It successfully run after re-start the lab.
I found that the problem was that I have deleted this role manually from AWS IAM roles
Thanks.