diff --git a/bindings/matrix-sdk-ffi/CHANGELOG.md b/bindings/matrix-sdk-ffi/CHANGELOG.md
index 664ac6fdd22..96f77b27651 100644
--- a/bindings/matrix-sdk-ffi/CHANGELOG.md
+++ b/bindings/matrix-sdk-ffi/CHANGELOG.md
@@ -8,6 +8,9 @@ All notable changes to this project will be documented in this file.
 
 ### Breaking changes:
 
+- The `event_id` field of `PredecessorRoom` was removed, due to its removal in the Matrix
+  specification with MSC4291.
+  ([#5419](https://github.com/matrix-org/matrix-rust-sdk/pull/5419))
 - `Client::url_for_oidc` now allows requesting additional scopes for the OAuth2 authorization code grant.
   ([#5395](https://github.com/matrix-org/matrix-rust-sdk/pull/5395))
 - `Client::url_for_oidc` now allows passing an optional existing device id from a previous login call.
diff --git a/bindings/matrix-sdk-ffi/src/room/mod.rs b/bindings/matrix-sdk-ffi/src/room/mod.rs
index ab6aa80f79a..a22909f6b4a 100644
--- a/bindings/matrix-sdk-ffi/src/room/mod.rs
+++ b/bindings/matrix-sdk-ffi/src/room/mod.rs
@@ -1504,13 +1504,10 @@ impl From<SdkSuccessorRoom> for SuccessorRoom {
 pub struct PredecessorRoom {
     /// The ID of the replacement room.
     pub room_id: String,
-
-    /// The event ID of the last known event in the predecesssor room.
-    pub last_event_id: String,
 }
 
 impl From<SdkPredecessorRoom> for PredecessorRoom {
     fn from(value: SdkPredecessorRoom) -> Self {
-        Self { room_id: value.room_id.to_string(), last_event_id: value.last_event_id.to_string() }
+        Self { room_id: value.room_id.to_string() }
     }
 }
diff --git a/crates/matrix-sdk-base/CHANGELOG.md b/crates/matrix-sdk-base/CHANGELOG.md
index 35e3964e78a..b1232f81971 100644
--- a/crates/matrix-sdk-base/CHANGELOG.md
+++ b/crates/matrix-sdk-base/CHANGELOG.md
@@ -15,6 +15,11 @@ All notable changes to this project will be documented in this file.
   inviter.
   ([#5390](https://github.com/matrix-org/matrix-rust-sdk/pull/5390))
 
+### Refactor
+- [**breaking**] The `event_id` field of `PredecessorRoom` was removed, due to
+  its removal in the Matrix specification with MSC4291.
+  ([#5419](https://github.com/matrix-org/matrix-rust-sdk/pull/5419))
+
 ## [0.13.0] - 2025-07-10
 
 ### Features
@@ -59,8 +64,8 @@ No notable changes in this release.
   - `EventCacheStoreMedia` has a new method `last_media_cleanup_time_inner`
   - There are new `'static` bounds in `MediaService` for the media cache stores
 - `event_cache::store::MemoryStore` implements `Clone`.
-- `BaseClient` now has a `handle_verification_events` field which is `true` by 
-  default and can be negated so the `NotificationClient` won't handle received 
+- `BaseClient` now has a `handle_verification_events` field which is `true` by
+  default and can be negated so the `NotificationClient` won't handle received
   verification events too, causing errors in the `VerificationMachine`.
 - [**breaking**] `Room::is_encryption_state_synced` has been removed
   ([#4777](https://github.com/matrix-org/matrix-rust-sdk/pull/4777))
diff --git a/crates/matrix-sdk-base/src/room/tombstone.rs b/crates/matrix-sdk-base/src/room/tombstone.rs
index 0a333685361..c285bf2a5aa 100644
--- a/crates/matrix-sdk-base/src/room/tombstone.rs
+++ b/crates/matrix-sdk-base/src/room/tombstone.rs
@@ -14,7 +14,7 @@
 
 use std::ops::Not;
 
-use ruma::{events::room::tombstone::RoomTombstoneEventContent, OwnedEventId, OwnedRoomId};
+use ruma::{events::room::tombstone::RoomTombstoneEventContent, OwnedRoomId};
 
 use super::Room;
 
@@ -67,12 +67,9 @@ impl Room {
     /// [`m.room.tombstone`]: https://spec.matrix.org/v1.14/client-server-api/#mroomtombstone
     /// [`m.room.create`]: https://spec.matrix.org/v1.14/client-server-api/#mroomcreate
     pub fn predecessor_room(&self) -> Option<PredecessorRoom> {
-        self.create_content().and_then(|content_event| content_event.predecessor).map(
-            |predecessor| PredecessorRoom {
-                room_id: predecessor.room_id,
-                last_event_id: predecessor.event_id,
-            },
-        )
+        self.create_content()
+            .and_then(|content_event| content_event.predecessor)
+            .map(|predecessor| PredecessorRoom { room_id: predecessor.room_id })
     }
 }
 
@@ -104,9 +101,6 @@ pub struct SuccessorRoom {
 pub struct PredecessorRoom {
     /// The ID of the old room.
     pub room_id: OwnedRoomId,
-
-    /// The event ID of the last known event in the predecesssor room.
-    pub last_event_id: OwnedEventId,
 }
 
 #[cfg(test)]
@@ -252,7 +246,6 @@ mod tests {
         assert!(room.create_content().is_some());
         assert_matches!(room.predecessor_room(), Some(predecessor_room) => {
             assert_eq!(predecessor_room.room_id, predecessor_room_id);
-            assert_eq!(predecessor_room.last_event_id, predecessor_last_event_id);
         });
     }
 }