Suggestion to mask S:31 (21653-21655) for KP.3.1.1 (and other S:31del lineages)

[xz-keg]

There seems to be a large KP.3.1.1+S:S31F branch, while KP.3.1.1 shall have S:31del.

That branch is driven by Denmark seqs which do not handle S:S31del well. When Querying C12616T, A13121T, C21654T all seqs are from Denmark, clearly an artifact.

However, that branch seems to attract seqs with no coverage at S:31 positions now, and form a very large artifact S:S31F branch under KP.3.1.1

@AngieHinrichs. Suggest to mask the deleted part of KP.3.1.1(and other S:31del lineages) on usher.

https://nextstrain.org/fetch/genome-test.gi.ucsc.edu/trash/ct/subtreeAuspice20_genome_test_32f78_b095f0.json?label=id:node_5486714