R 4.3.3 | lme4 1.1.35.1 | lmerTest 3.1.3 
Warning message:
In checkConv(attr(opt, "derivs"), opt$par, ctrl = control$checkConv,  :
  Model failed to converge with max|grad| = 0.00277482 (tol = 0.002, component 1)
simulations: 1000 
false-positive rate:
    m1     m2 paired 
 0.216  0.068  0.059 
singular fits:
   m1    m2 
0.013 0.312