diff --git a/study/tt_34/tt_334/tt_334.json b/study/tt_34/tt_334/tt_334.json
index 26741f8d..d1f95755 100644
--- a/study/tt_34/tt_334/tt_334.json
+++ b/study/tt_34/tt_334/tt_334.json
@@ -156,6 +156,7 @@
 }
 ]
 },
+"^ot:candidateTreeForSynthesis": [],
 "^ot:comment": "",
 "^ot:curatorName": [
 "Luna L. Sanchez Reyes",
@@ -220,7 +221,8 @@
 "@label": "Untitled (tree1)",
 "@xsi:type": "nex:FloatTree",
 "^ot:branchLengthDescription": "",
-"^ot:branchLengthMode": "ot:undefined",
+"^ot:branchLengthMode": "ot:substitutionCount",
+"^ot:branchLengthTimeUnit": "Myr",
 "^ot:candidateForSynthesis": "ot:notReviewed",
 "^ot:curatedType": "",
 "^ot:inGroupClade": "",