Hi. I am using metaprop to calculate prevalence of infections. The command I am using is

metaprop pos1 total1 if sti=="SYPHILIS", ftt nobox sortby(Year) lcols(Study Year) nowt power(2) xlabel(0,5,10,15,20) texts(200)

pos1=numerator (number of people positive)
total1=denominator (number of people tested)

why is the I2 zero and no p-value is being generated?

help. Thanks