If you are engaged in formal inspection work, then once this happens, the culture medium cannot be used. Once clumps occur, it means that the dry powder of the culture medium has deteriorated. No matter how effective its culture is, it has been judged as unqualified in quality control from the appearance, and naturally cannot be used. At the same time, such culture medium should also be discarded (if you want to keep it for some informal experiments, you can write "for practice only" on the packaging bottle)