so your pergo floor is at lease about 15- 20 years old
then it was replaced by lock in system.pergo planks.
Maybe,best way to repair it .
if the edges not beaked, then you can saparate the planks compleatly (make sure you number them ).
,clean the grove and the tung from the glue, with tools not with lequide.
then try to test it by fitting the same planks location in each raw.
if it fits good then use any wood liquide glue like amoure glue,to glue them to gather
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