Hello. Maybe someone had this... We're 8 months old. At 6 months we in…

Hello. Maybe someone had this... We're 8 months old. At 6 months we introduced purees, mashed potatoes... And for the last three days, the child has become very thick stool, like Play-Doh in small amounts and it's noticeable how hard he is doing these things... The stool turned dark green. While we stopped the complementary food, we only give him formula and water. Who encountered this, please tell me what they did? How can I help the child?