I am playing a Navarra colonisation game, and I managed to take Madeira, the Azores and Labourd, and allied with Castille and Aragon. I finish colonising Cape Verde when France declares war. It doesn't end well and Castille and Aragon peace out, with all my provinces, except Cape Verde occupied. The war has now been going on for 30 years and I can't peace out. France does not desire anything apart from Labourd or concede defeat, but the length of war modifier is only 50 and increasing slowly, compared to -99 warscore and various other negative modifiers. Any advice on what to do?