diff --git a/packages/cli/BREAKING-CHANGES.md b/packages/cli/BREAKING-CHANGES.md
index 6d70510095..540749ed43 100644
--- a/packages/cli/BREAKING-CHANGES.md
+++ b/packages/cli/BREAKING-CHANGES.md
@@ -2,6 +2,19 @@
 
 This list shows all the versions which include breaking changes and how to upgrade.
 
+## 1.27.0
+
+### What changed?
+
+The execution mode `own` was removed.
+If `EXECUTIONS_PROCESS` is set to `main` or if `executions.process` in a config file is set to `main` n8n will print a warning, but start up normally.
+If `EXECUTIONS_PROCESS` is set to `own` or if `executions.process` in a config file is set to `own` n8n will print an error message and refuse to start up.
+
+### When is action necessary?
+
+If you use `own` mode and need the isolation and performance gains, please consider using queue mode instead, otherwise switch to main mode by removing the environment variable or config field.
+If you have the environment variable `EXECUTIONS_PROCESS` or the config field `executions.process` set, please remove them. The environment variable has no effect anymore and the configuration field will be removed in future releases, prevent n8n from starting if it is still set.
+
 ## 1.25.0
 
 ### What changed?