diff --git a/config/configsanity.go b/config/configsanity.go
index f757498f7..cd67113ac 100644
--- a/config/configsanity.go
+++ b/config/configsanity.go
@@ -644,6 +644,9 @@ func (cfg *CGRConfig) checkConfigSanity() error {
 					utils.IfaceAsString(fldSep) == utils.EmptyString {
 					return fmt.Errorf("<%s> empty %s for reader with ID: %s", utils.ERs, utils.PartialCSVFieldSepartorOpt, rdr.ID)
 				}
+				if len(rdr.CacheDumpFields) == 0 {
+					return fmt.Errorf("<%s> empty %s for reader with ID: %s", utils.ERs, utils.CacheDumpFieldsCfg, rdr.ID)
+				}
 			}
 			switch rdr.Type {
 			case utils.MetaFileCSV:
diff --git a/config/configsanity_test.go b/config/configsanity_test.go
index bff2eb32a..4efcdc97e 100644
--- a/config/configsanity_test.go
+++ b/config/configsanity_test.go
@@ -1818,6 +1818,15 @@ func TestConfigSanityErs(t *testing.T) {
 		t.Errorf("expected: <%v>,\n received: <%v>", expected, err)
 	}
 
+	cfg.ersCfg.Readers[0].Opts = map[string]interface{}{
+		utils.PartialCacheActionOpt:      utils.MetaDumpToFile,
+		utils.PartialCSVFieldSepartorOpt: utils.FieldsSep,
+	}
+	expected = "<ERs> empty cache_dump_fields for reader with ID: rdrID"
+	if err := cfg.checkConfigSanity(); err == nil || err.Error() != expected {
+		t.Errorf("expected: <%v>,\n received: <%v>", expected, err)
+	}
+
 	cfg.ersCfg.Readers[0].Opts = map[string]interface{}{
 		utils.PartialOrderFieldOpt:  "non_empty",
 		utils.PartialCacheActionOpt: utils.MetaDumpToFile,