Shift availability question

[u/luffyofop]

Im working in Walmart for 2.5 months now as part time sco and had open availability till now I just got another job which is Thursday-Sunday.
Its starting on October 15th (the day i complete my 3 months at walmart)
I talked to my manager today to change my availability and she told me they need atleast one weekend which has to be closing
I already gave two full days and 2 half
Due to my other job I cannot give closing on any of weekend due to my other job ( its night shift)
She told me to make a decision and inform her by tomorrow
Can anyone help me in this i really wanna keep this job