diff --git a/specs/core/1_shard-data-chains.md b/specs/core/1_shard-data-chains.md
index 613b4c4c2..330840598 100644
--- a/specs/core/1_shard-data-chains.md
+++ b/specs/core/1_shard-data-chains.md
@@ -13,7 +13,7 @@
         - [Misc](#misc)
         - [Initial values](#initial-values)
         - [Time parameters](#time-parameters)
-        - [Signature domains](#signature-domains)
+        - [Signature domain types](#signature-domain-types)
         - [TODO PLACEHOLDER](#todo-placeholder)
     - [Data structures](#data-structures)
         - [`ShardBlockBody`](#shardblockbody)
@@ -61,7 +61,6 @@ This document describes the shard data layer and the shard fork choice rule in P
 | Name | Value | Unit | Duration |
 | - | - | :-: | :-: |
 | `CROSSLINK_LOOKBACK` | `2**0` (= 1) | epochs  | 6.2 minutes |
-| `PERSISTENT_COMMITTEE_PERIOD` | `2**11` (= 2,048) | epochs | ~9 days |
 
 ### Signature domain types