diff --git a/quacc/evaluation/report.py b/quacc/evaluation/report.py
index 56019a9..50ff5ad 100644
--- a/quacc/evaluation/report.py
+++ b/quacc/evaluation/report.py
@@ -280,6 +280,9 @@ class DatasetReport:
         return np.around([(1.0 - p, p) for p in self.prevs], decimals=2)
 
     def add(self, cr: CompReport):
+        if cr is None:
+            return
+
         self.crs.append(cr)
 
         if self._dict is None:
@@ -320,6 +323,11 @@ class DatasetReport:
                     [self.s_dict[col][sp], cr_s_dict[col][sp]]
                 )
 
+        for sp in self.s_prevs:
+            for col, vals in self.s_dict.items():
+                if sp not in vals:
+                    vals[sp] = []
+
         for k, score in cr.fit_scores.items():
             if k not in self.fit_scores:
                 self.fit_scores[k] = []