iOS Question missing private key

Hello,

I have created a new certificate. I am getting this error iwth local builder. What must I do ?

Missing private key for signing certificate. Failed to locate the private key matching certificate "iPhone Distribution: TUFAN VATANDOST (AXD74RVYT3)" in the keychain. To sign with this signing certificate, install its private key in your keychain. If you don't have the private key, select a different signing certificate for CODE_SIGN_IDENTITY in the build settings editor. (in target 'B4iProject')

Thanks