Bring guava paste, ginger, garlic, chipotle chile, ½ cup apple cider vinegar, ⅓ cup spiced or dark rum, 3 Tbsp. fresh lime juice, 3 Tbsp. ketchup, 1 Tbsp. soy sauce, ½ tsp. ground allspice and ¼ cup water to a simmer in a medium pot over medium-high heat, about 5 minutes. Reduce heat to medium and continue simmering, stirring occasionally, until guava melts and sauce is thick but pourable, about 10 minutes. Scoop out ½ cup sauce and set aside for serving.