Absent an affidavit made on personal knowledge, this court has no basis on which to rely on the assertions made in plaintiff's opposition. (SeeUtopia Heart Care, P.L.L.C. v Gramercy Cardiac Diagnostic Servs., P.C. , 192 AD3d 473, 473 [1st Dept 2021] ; Cullin v Spiess , 122 AD3d 792, 793 [2d Dept 2014].) Additionally, those documents themselves raise their own questions.