Buhari why i didnt sack my ministers

I think there may be some confusion here!

You're asking why President Muhammadu Buhari didn't sack his ministers, but I think you may be referring to a specific incident or controversy. Could you please provide more context or clarify what you're referring to?

As a neutral AI, I'll do my best to provide information on the topic. However, I'd like to clarify that President Buhari has indeed made changes to his cabinet and has sacked some ministers during his tenure. If you're referring to a specific instance, please let me know and I'll try to provide more information.