Why did Abd el-Krim reject Spanish peace negotiations?

During the Rif War, Abd el-Krim rejected peace negotiations proposed by the Spanish government in late 1924 because he refused to accept any agreement that did not explicitly recognize the full sovereignty of the Republic of the Rif.1

At that time, the Spanish government, led by Gen. Miguel Primo de Rivera, sought to end the costly and unpopular conflict by pursuing peace talks while simultaneously withdrawing forces from the western part of the protectorate. Abd el-Krim, however, viewed these negotiations as insufficient for his movement's goals and instead utilized the opportunity to rapidly advance his forces into the territory vacated by the retreating Spanish troops.1