diff --git a/doc/todo/metadata_batch_command_should_allow_changes_by_key.mdwn b/doc/todo/metadata_batch_command_should_allow_changes_by_key.mdwn
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+while writing a script that links related files via meta-data i found that meta-data lookup by key works in batch mode, but meta-data storage by key doesn't
+
+my scripts output was lines like:
+
+    {"key": "SHA256E-s13238976--7f9f459b99e36e9d50e6da349258525c9f63a33bd5f5bf5a3284cc0e4bda5fd8.ARW", "fields": {"linked.image": "SHA256Es3983492--0fef9eba38c21629e2ae06bd7f64dae104d8576e3c4d31b2caf7337a1ed8c3a9.JPG"}}
+    {"key": "SHA256E-s3983492--0fef9eba38c21629e2ae06bd7f64dae104d8576e3c4d31b2caf7337a1ed8c3a9.JPG", "fields": {"linked.raw": "SHA256E-s13238976--7f9f459b99e36e9d50e6da349258525c9f63a33bd5f5bf5a3284cc0e4bda5fd8.ARW"}}
+
+and the full pipe was
+
+     git annex info */*.* --json --fast| python3 ./check_has_all_raws.py |git annex metadata --batch --json
+
+to my surprise all i got was the retrial of the existing meta-data instead of the addition of the linked fields
+
+IHO git annex should allow to store metadata in batch mode by key