Weird error with `AffineGapScoreModel()`

[jakobnissen]

julia> AffineGapScoreModel()
ERROR: KeyError: key :match not found
Stacktrace:
 [1] getindex(h::Dict{Symbol, Union{}}, key::Symbol)
   @ Base ./dict.jl:498
 [2] AffineGapScoreModel(; scores::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
   @ BioAlignments ~/code/BioAlignments.jl/src/models.jl:97
 [3] AffineGapScoreModel()
   @ BioAlignments ~/code/BioAlignments.jl/src/models.jl:95
 [4] top-level scope
   @ REPL[7]:1