See: Maciej Chyleński et al

"We suspected that genetic influx from HG to farming communities might have happened in Late Danubian cultures since archaeologists see extensive contacts between those two communities."

"Here we address this issue by presenting 5 complete mitochondrial genomes of various late Danubian individuals from modern-day Poland and combining it with available published data. Our data show that Late Danubian cultures are maternally closely related to Funnel Beaker groups instead of culturally similar LBK."

We assume that it is an effect of the presence of individuals belonging to U5 haplogroup both in Late Danubians and the TRB. The U5 haplogroup is thought to be a typical for HGs of Europe and therefore we argue that it is an additional evidence of genetic exchange between farming and HG groups taking place at least as far back as in middle Neolithic, in the Late Danubian communities."

Sample Archaeol. culture Region Site Age* Morphological sex mt genome coverage % of mt genomea Haplotype
Jan1 HG Kuyavia Janisławice 5509 ± 135 cal. BC M 23x 84,4116 U5b1b1
Sam1 LBK Little Poland Samborzec 5300–5000 BC F 34x 99,7888 N1a1a1a
KM1 LDN Little Poland Kazimierza Mała 4800–4500 BC F 27x 99,9759 U5b1b
KZ6 LDN Kuyavia Krusza Zamkowa 4500–4000 BC F 43x 99,9215 N1a1a1a3
R18_1 LDN Greater Poland Racot 4200 ± 55 cal. BC F 9x 98,6119 K2a

I don't understand this part of the analysis. Why are they putting some of those lineages under "Other"?