diff --git a/changes/1448.outlier_detection.1.rst b/changes/1448.outlier_detection.1.rst
new file mode 100644
index 000000000..2080601d1
--- /dev/null
+++ b/changes/1448.outlier_detection.1.rst
@@ -0,0 +1 @@
+Group by obs_id
diff --git a/changes/1448.resample.2.rst b/changes/1448.resample.2.rst
new file mode 100644
index 000000000..2080601d1
--- /dev/null
+++ b/changes/1448.resample.2.rst
@@ -0,0 +1 @@
+Group by obs_id
diff --git a/changes/1448.tweakreg.0.rst b/changes/1448.tweakreg.0.rst
new file mode 100644
index 000000000..2080601d1
--- /dev/null
+++ b/changes/1448.tweakreg.0.rst
@@ -0,0 +1 @@
+Group by obs_id