The files recipes-kernel/linux/linux-altera-lts_5.10.bb and recipes-kernel/linux/linux-altera_5.13.bb in commit 237cd5ecd28491dbcff16d8d64662d3b56ac30df contains lines like
SRC_URI:append_cyclone5 = " file://lbdaf.scc "
which are not understood by bitbake 1.46. AFACT this syntax was introduced in bitbake 1.52. As such, this seems wrong for a branch called "dunfell" (since dunfell uses bitbake 1.46).
The files
recipes-kernel/linux/linux-altera-lts_5.10.bbandrecipes-kernel/linux/linux-altera_5.13.bbin commit 237cd5ecd28491dbcff16d8d64662d3b56ac30df contains lines likewhich are not understood by bitbake 1.46. AFACT this syntax was introduced in bitbake 1.52. As such, this seems wrong for a branch called "dunfell" (since dunfell uses bitbake 1.46).