diff --git a/CHANGES.txt b/CHANGES.txt
index 2bbecfca5a..46e8b5fc1e 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,4 +1,5 @@
 6.0-alpha2
+ * Fix Accord transaction error message when altering a table (CASSANDRA-20580)
  * Depend only on platform-specific Zstd JNI native libraries (CASSANDRA-21483)
  * Expose immediately-executed tasks in the queries virtual table (CASSANDRA-21471)
  * Avoid potential deadlock between GlobalLogFollower and GossipStage (CASSANDRA-21384)
diff --git a/src/java/org/apache/cassandra/cql3/statements/schema/AlterTableStatement.java b/src/java/org/apache/cassandra/cql3/statements/schema/AlterTableStatement.java
index aee1496cb5..09501c8446 100644
--- a/src/java/org/apache/cassandra/cql3/statements/schema/AlterTableStatement.java
+++ b/src/java/org/apache/cassandra/cql3/statements/schema/AlterTableStatement.java
@@ -653,7 +653,7 @@ public abstract class AlterTableStatement extends AlterSchemaStatement
             boolean forceMigrationChange = modeChange && explicitlySetMigrationFrom && next.transactionalMigrationFrom != newMigrateFrom;
 
             if (modeChange && next.transactionalMode.accordIsEnabled && !DatabaseDescriptor.getAccordTransactionsEnabled())
-                throw ire(format("Cannot change transactional mode to %s for %s.%s with accord_transactions_enabled set to false",
+                throw ire(format("Cannot change transactional mode to %s for %s.%s with accord.enabled set to false",
                                  next.transactionalMode, keyspaceName, tableName));
 
             // user is manually updating migration mode, don't interfere