diff --git a/MIGRATION_v9_to_v10.md b/MIGRATION_v9_to_v10.md
index c314be92b4..873ffe95c0 100644
--- a/MIGRATION_v9_to_v10.md
+++ b/MIGRATION_v9_to_v10.md
@@ -66,9 +66,12 @@ adcp 10.0.0b0–b3 are 1):
 - `adcp-reporting-storage` 0.2.0b1 requires `adcp>=10.0.0b4,<11`; the
   0.2.0b0 / 0.1.0b4 releases do not work with 10.0.0b4 or later
   ([#1763](https://github.com/adcontextprotocol/adcp-client-python/issues/1763)).
-- Startup (`ReliableReportingService`, `postgres_storage`) refuses a pair whose
-  contracts differ with `REPORTING_SCHEMA_BEHIND`, naming both versions and
-  the release to install.
+- From adcp 10.0.0b7, startup (`ReliableReportingService`, `postgres_storage`)
+  refuses a pair whose contracts differ with `REPORTING_SCHEMA_BEHIND`, naming
+  both versions and the release to install. adcp 10.0.0b4 and 10.0.0b5 have no
+  such check and still install beside 0.2.0b0, which then fails every reporting
+  turn, so install `adcp>=10.0.0b7`
+  ([#1837](https://github.com/adcontextprotocol/adcp-client-python/issues/1837)).
 - An existing SDK 9 ledger is upgraded in place by `create_schema()` or
   `python -m adcp migrate`: `offering_id` is added with `''` for every
   existing account-level generation, obligation and status, and the applied
diff --git a/docs/reporting-ledger-migration.md b/docs/reporting-ledger-migration.md
index 6a98f6ec35..b02a932c82 100644
--- a/docs/reporting-ledger-migration.md
+++ b/docs/reporting-ledger-migration.md
@@ -288,9 +288,12 @@ adcp 10.0.0b4 widened the configuration generation key with `offering_id`
 (AdCP 3.3 reporting subscriptions) and reads it from `reporting_configurations`,
 `reporting_obligations` and `reporting_consumer_statuses`. The storage releases
 before 0.2.0b1 do not create the column, so that pair fails every reporting
-turn with `column "offering_id" does not exist`. From 0.2.0b1 the pair is
-refused at startup instead (storage contract 1 versus 2; see
-`packages/adcp-reporting-storage/README.md`), and both schema entry points
+turn with `column "offering_id" does not exist`. adcp 10.0.0b7 and later
+refuse that pair at startup instead (storage contract 1 versus 2; see
+`packages/adcp-reporting-storage/README.md`). adcp 10.0.0b4 and 10.0.0b5
+predate the check and still install beside 0.2.0b0, so that pair fails every
+turn: install `adcp>=10.0.0b7` with `adcp-reporting-storage>=0.2.0b1`
+(10.0.0b6 was not published). From 0.2.0b1, both schema entry points
 upgrade an existing ledger in place:
 
 - `PgReportingLedgerStore.create_schema()`, which `ReliableReportingService`
diff --git a/packages/adcp-reporting-storage/README.md b/packages/adcp-reporting-storage/README.md
index 63d542e153..93767ff5ce 100644
--- a/packages/adcp-reporting-storage/README.md
+++ b/packages/adcp-reporting-storage/README.md
@@ -58,14 +58,22 @@ the **storage contract**, numbered on both sides
 (`adcp_reporting_storage.STORAGE_CONTRACT`,
 `adcp.reporting.ledger.storage_contract.REPORTING_STORAGE_CONTRACT`) and bumped
 together whenever the shared layout changes. The dependency floor is the first
-`adcp` release of the contract this package implements, so an incompatible pair
-does not resolve; if one is forced, building a PostgreSQL store refuses at
-startup, naming both versions and the release to install.
+`adcp` release of the contract this package implements, so this release
+cannot be installed beside an older `adcp`. Forcing it anyway fails at import.
+From adcp 10.0.0b7, building a PostgreSQL store also refuses a package of another
+contract at startup (`REPORTING_SCHEMA_BEHIND`), naming both versions and the
+release to install.
+
+That check is in `adcp`, so it cannot cover releases that predate it:
+`adcp` 10.0.0b4 and 10.0.0b5 still resolve beside 0.2.0b0 and fail every
+reporting turn with `column "offering_id" does not exist`
+([#1763](https://github.com/adcontextprotocol/adcp-client-python/issues/1763)).
+Install `adcp>=10.0.0b7` with this release.
 
 | adcp-reporting-storage | storage contract | adcp |
 |---|---|---|
 | 0.1.0b4 (SDK 9 line) | 1 | `>=9.0.0,<10` |
-| 0.2.0b0 | 1 | `>=9.0.0,<11` (**do not pair with 10.0.0b4+**, [#1763](https://github.com/adcontextprotocol/adcp-client-python/issues/1763)) |
+| 0.2.0b0 | 1 | `>=9.0.0,<11` (**do not pair with 10.0.0b4+**: 10.0.0b4 and b5 install beside it and fail, b7+ refuse it, [#1763](https://github.com/adcontextprotocol/adcp-client-python/issues/1763)) |
 | 0.2.0b1+ | 2 | `>=10.0.0b4,<11` |
 
 `adcp` never imports this package; a test in the main repository enforces that.