diff --git a/package-lock.json b/package-lock.json
index 72577578..eedc922d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,7 +17,7 @@
         "express-handlebars": "7.1.2",
         "express-rate-limit": "^7.1.5",
         "express-validator": "7.0.1",
-        "faims3-datamodel": "github:FAIMS/faims3-data-model#v1.1.1",
+        "faims3-datamodel": "github:FAIMS/faims3-data-model#v1.1.5",
         "fast-check": "2.25.0",
         "gts": "3.1.1",
         "handlebars": "4.7.7.",
@@ -4776,8 +4776,8 @@
       }
     },
     "node_modules/faims3-datamodel": {
-      "version": "1.1.1",
-      "resolved": "git+ssh://git@github.com/FAIMS/faims3-data-model.git#b5bbfaef216a6bdaa194f77fc6ebcea1b820da9a",
+      "version": "1.1.5",
+      "resolved": "git+ssh://git@github.com/FAIMS/faims3-data-model.git#377428607669ffe66520cbd6954e837c278271e4",
       "license": "Apache",
       "dependencies": {
         "@demvsystems/yup-ast": "^1.2.2",
@@ -14989,8 +14989,8 @@
       }
     },
     "faims3-datamodel": {
-      "version": "git+ssh://git@github.com/FAIMS/faims3-data-model.git#b5bbfaef216a6bdaa194f77fc6ebcea1b820da9a",
-      "from": "faims3-datamodel@github:FAIMS/faims3-data-model#v1.1.1",
+      "version": "git+ssh://git@github.com/FAIMS/faims3-data-model.git#377428607669ffe66520cbd6954e837c278271e4",
+      "from": "faims3-datamodel@github:FAIMS/faims3-data-model#v1.1.5",
       "requires": {
         "@demvsystems/yup-ast": "^1.2.2",
         "@types/pouchdb": "^6.4.0",
diff --git a/package.json b/package.json
index 7980eaa8..9186a5b9 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "express-handlebars": "7.1.2",
     "express-rate-limit": "^7.1.5",
     "express-validator": "7.0.1",
-    "faims3-datamodel": "github:FAIMS/faims3-data-model#v1.1.1",
+    "faims3-datamodel": "github:FAIMS/faims3-data-model#v1.1.5",
     "fast-check": "2.25.0",
     "gts": "3.1.1",
     "handlebars": "4.7.7.",
diff --git a/src/couchdb/notebooks.ts b/src/couchdb/notebooks.ts
index c4ba08e8..93e0e699 100644
--- a/src/couchdb/notebooks.ts
+++ b/src/couchdb/notebooks.ts
@@ -637,7 +637,10 @@ const csvFormatValue = (
     if (value instanceof Array) {
       result[fieldName] = value
         .map((v: any) => {
-          return `${v.relation_type_vocabPair[0]}/${v.record_id}`;
+          const relation_name = v.relation_type_vocabPair
+            ? v.relation_type_vocabPair[0]
+            : 'unknown relation';
+          return `${relation_name}/${v.record_id}`;
         })
         .join(';');
     } else {
@@ -809,8 +812,12 @@ export const streamNotebookFilesAsZip = async (
       allFilesAdded &&
       ev.entries.total === ev.entries.processed
     ) {
-      archive.finalize();
-      doneFinalize = true;
+      try {
+        archive.finalize();
+        doneFinalize = true;
+      } catch {
+        // ignore ArchiveError
+      }
     }
   });
 
@@ -862,7 +869,8 @@ export const streamNotebookFilesAsZip = async (
   }
   // if we didn't write any data then finalise because that won't happen elsewhere
   if (!dataWritten) {
-    archive.finalize();
+    console.log('no data written');
+    archive.abort();
   }
   allFilesAdded = true;
   // fire a progress event here because short/empty zip files don't