Version 5.1.7+dfsg-6 of r-cran-rcppparallel is marked for autoremoval from testing on Sat 30 May 2026. It is affected by #1134031. The removal of r-cran-rcppparallel will also cause the removal of (transitive) reverse dependencies: r-cran-brms, r-cran-lamw, r-cran-rstan, r-cran-rstantools, r-cran-stanheaders. You should try to prevent the removal by fixing these RC bugs.