diff --git a/src/utils/attribution-manager-helpers.js b/src/utils/attribution-manager-helpers.js
index fc9d44ee..816074f5 100644
--- a/src/utils/attribution-manager-helpers.js
+++ b/src/utils/attribution-manager-helpers.js
@@ -4,9 +4,9 @@ import { ObservableV2 } from 'lib0/observable'
 
 export const attributionJsonSchema = s.$object({
   insert: s.$array(s.$string).optional,
-  insertedAt: s.$number.optional,
+  insertAt: s.$number.optional,
   delete: s.$array(s.$string).optional,
-  deletedAt: s.$number.optional,
+  deleteAt: s.$number.optional,
   format: s.$record(s.$string, s.$array(s.$string)).optional,
   formatAt: s.$number.optional
 })
diff --git a/src/ytype.js b/src/ytype.js
index 143a83b8..ab79c2fe 100644
--- a/src/ytype.js
+++ b/src/ytype.js
@@ -1036,13 +1036,13 @@ export class YType {
                 } else {
                   const by = changedAttributedAttributes[key] = (changedAttributedAttributes[key]?.slice() ?? [])
                   by.push(...((c.deleted ? attribution.delete : attribution.insert) ?? []))
-                  const attributedAt = (c.deleted ? attribution.deletedAt : attribution.insertedAt)
+                  const attributedAt = (c.deleted ? attribution.deleteAt : attribution.insertAt)
                   if (attributedAt) formattingAttribution.formatAt = attributedAt
                 }
                 if (object.isEmpty(changedAttributedAttributes)) {
                   d.useAttribution(null)
                 } else if (attribution != null) {
-                  const attributedAt = (c.deleted ? attribution.deletedAt : attribution.insertedAt)
+                  const attributedAt = (c.deleted ? attribution.deleteAt : attribution.insertAt)
                   if (attributedAt != null) formattingAttribution.formatAt = attributedAt
                   d.useAttribution(formattingAttribution)
                 }
diff --git a/tests/y-array.tests.js b/tests/y-array.tests.js
index 30e94b80..dc87491e 100644
--- a/tests/y-array.tests.js
+++ b/tests/y-array.tests.js
@@ -470,7 +470,7 @@ export const testAttributedContent = _tc => {
   let attributionManager = Y.noAttributionsManager
 
   ydoc.on('afterTransaction', tr => {
-    // attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, [new Y.Attribution('insertedAt', 42), new Y.Attribution('insert', 'kevin')]), createIdMapFromIdSet(tr.deleteSet, [new Y.Attribution('delete', 'kevin')]))
+    // attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, [new Y.Attribution('insertAt', 42), new Y.Attribution('insert', 'kevin')]), createIdMapFromIdSet(tr.deleteSet, [new Y.Attribution('delete', 'kevin')]))
     attributionManager = new Y.TwosetAttributionManager(Y.createIdMapFromIdSet(tr.insertSet, []), Y.createIdMapFromIdSet(tr.deleteSet, []))
   })
   t.group('insert / delete', () => {
diff --git a/tests/y-map.tests.js b/tests/y-map.tests.js
index cb97105d..06c76ead 100644
--- a/tests/y-map.tests.js
+++ b/tests/y-map.tests.js
@@ -553,7 +553,7 @@ export const testAttributedContent = _tc => {
   let attributionManager = noAttributionsManager
 
   ydoc.on('afterTransaction', tr => {
-    // attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, [new Y.Attribution('insertedAt', 42), new Y.Attribution('insert', 'kevin')]), createIdMapFromIdSet(tr.deleteSet, [new Y.Attribution('delete', 'kevin')]))
+    // attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, [new Y.Attribution('insertAt', 42), new Y.Attribution('insert', 'kevin')]), createIdMapFromIdSet(tr.deleteSet, [new Y.Attribution('delete', 'kevin')]))
     attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, []), createIdMapFromIdSet(tr.deleteSet, []))
   })
   t.group('initial value', () => {
diff --git a/tests/y-text.tests.js b/tests/y-text.tests.js
index b7c073a1..20dffe12 100644
--- a/tests/y-text.tests.js
+++ b/tests/y-text.tests.js
@@ -1903,7 +1903,7 @@ export const testAttributedContent = _tc => {
   let attributionManager = noAttributionsManager
 
   ydoc.on('afterTransaction', tr => {
-    // attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, [new Y.Attribution('insertedAt', 42), new Y.Attribution('insert', 'kevin')]), createIdMapFromIdSet(tr.deleteSet, [new Y.Attribution('delete', 'kevin')]))
+    // attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, [new Y.Attribution('insertAt', 42), new Y.Attribution('insert', 'kevin')]), createIdMapFromIdSet(tr.deleteSet, [new Y.Attribution('delete', 'kevin')]))
     attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, []), createIdMapFromIdSet(tr.deleteSet, []))
   })
   t.group('insert / delete / format', () => {
diff --git a/tests/y-xml.tests.js b/tests/y-xml.tests.js
index 5cfaa94a..4cdbb936 100644
--- a/tests/y-xml.tests.js
+++ b/tests/y-xml.tests.js
@@ -141,7 +141,7 @@ export const testFragmentAttributedContent = _tc => {
   ydoc.get().insert(0, [yfragment])
   let attributionManager = Y.noAttributionsManager
   ydoc.on('afterTransaction', tr => {
-    // attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, [new Y.Attribution('insertedAt', 42), new Y.Attribution('insert', 'kevin')]), createIdMapFromIdSet(tr.deleteSet, [new Y.Attribution('delete', 'kevin')]))
+    // attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, [new Y.Attribution('insertAt', 42), new Y.Attribution('insert', 'kevin')]), createIdMapFromIdSet(tr.deleteSet, [new Y.Attribution('delete', 'kevin')]))
     attributionManager = new Y.TwosetAttributionManager(Y.createIdMapFromIdSet(tr.insertSet, []), Y.createIdMapFromIdSet(tr.deleteSet, []))
   })
   t.group('insert / delete', () => {
@@ -169,7 +169,7 @@ export const testElementAttributedContent = _tc => {
   yelement.insert(0, [elem1, elem2])
   let attributionManager = Y.noAttributionsManager
   ydoc.on('afterTransaction', tr => {
-    // attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, [new Y.Attribution('insertedAt', 42), new Y.Attribution('insert', 'kevin')]), createIdMapFromIdSet(tr.deleteSet, [new Y.Attribution('delete', 'kevin')]))
+    // attributionManager = new TwosetAttributionManager(createIdMapFromIdSet(tr.insertSet, [new Y.Attribution('insertAt', 42), new Y.Attribution('insert', 'kevin')]), createIdMapFromIdSet(tr.deleteSet, [new Y.Attribution('delete', 'kevin')]))
     attributionManager = new Y.TwosetAttributionManager(Y.createIdMapFromIdSet(tr.insertSet, []), Y.createIdMapFromIdSet(tr.deleteSet, []))
   })
   t.group('insert / delete', () => {