Estonia, Latvia, Lithuania, and Poland cite the Russo-Ukranian War and Russian aggression in general as a valid reason to restart the production of anti-personnel landmines. Russia is not a signatory to the Ottawa Convention;

Our countries are prepared and can use every necessary measure to defend our territory,’ say defense ministers of Estonia, Latvia, Lithuania, and Poland - Anadolu Ajansı

But the ministers of Poland, Lithuania, Latvia and Estonia argue that the security situation along NATO’s eastern flank has “fundamentally deteriorated” since they signed on to the Anti-Personnel Mine Ban Convention, and that “military threats to NATO member states bordering Russia and Belarus have significantly increased.”