diff --git a/CHANGELOG.md b/CHANGELOG.md
index fa6a988..83e13f6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,17 @@
-## 2.0.0-dev.XX.0
-(Add new changes here, and they will be copied to the
- change section for the next dev version)
+## 2.0.0-dev.50.0
+
+## 2.0.0-dev.49.0
+
+### Tool Changes
+
+#### Pub
+
+* Fix another bug where the version solver could crash when resolving a conflict
+  involving pre-release constraints ([`pub_semver` issue 20][]).
+
+[`pub_semver` issue 20]: https://github.com/dart-lang/pub_semver/issues/20
+
+## 2.0.0-dev.48.0
 
 ### Language
 
@@ -18,15 +29,10 @@
 
 ## 2.0.0-dev.49.0
 
+## 2.0.0-dev.47.0
+
 ### Tool Changes
 
-#### Pub
-
-* Fix another bug where the version solver could crash when resolving a conflict
-  involving pre-release constraints ([`pub_semver` issue 20][]).
-
-[`pub_semver` issue 20]: https://github.com/dart-lang/pub_semver/issues/20
-
 ## 2.0.0-dev.48.0
 
 ### Core library changes
diff --git a/tools/VERSION b/tools/VERSION
index a3f39d7..5c6fbcc 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -23,9 +23,9 @@
 #  * Making cherry-picks to stable channel
 #     - increase PATCH by 1
 #
-CHANNEL be
+CHANNEL dev
 MAJOR 2
 MINOR 0
 PATCH 0
-PRERELEASE 0
+PRERELEASE 50
 PRERELEASE_PATCH 0