diff --git a/common/proto/tables_data.proto b/common/proto/tables_data.proto
index 968851bb..128970b2 100644
--- a/common/proto/tables_data.proto
+++ b/common/proto/tables_data.proto
@@ -102,7 +102,8 @@ message PostTableDataRequest {
   // - System/FK columns:
   //    • "deleted" (BOOLEAN), optional; default FALSE if not provided
   //    • one BIGINT per link, named by whoever declared it
-  //    • "account" (slash-delimited account string) on ACCOUNTING-enabled tables
+  //    • "account" (required, non-null slash-delimited account string) on
+  //      ACCOUNTING-enabled tables
   //
   // Type expectations by SQL type:
   // - TEXT: string value; empty string is treated as NULL
@@ -182,6 +183,7 @@ message PutTableDataRequest {
   int64 id = 3;
 
   // Required. Columns to update (same typing rules as PostTableDataRequest.data).
+  // "account" may be omitted, but cannot be null when supplied.
   //
   // Special script rules:
   // - If a script targets column X and X is included here, the value for X must
diff --git a/common/src/proto/descriptor.bin b/common/src/proto/descriptor.bin
index e106dc3f..9f6fc120 100644
Binary files a/common/src/proto/descriptor.bin and b/common/src/proto/descriptor.bin differ
diff --git a/common/src/proto/komp_ac.tables_data.rs b/common/src/proto/komp_ac.tables_data.rs
index deebf2d7..627c388a 100644
--- a/common/src/proto/komp_ac.tables_data.rs
+++ b/common/src/proto/komp_ac.tables_data.rs
@@ -18,7 +18,8 @@ pub struct PostTableDataRequest {
     /// * System/FK columns:
     ///   • "deleted" (BOOLEAN), optional; default FALSE if not provided
     ///   • one BIGINT per link, named by whoever declared it
-    ///   • "account" (slash-delimited account string) on ACCOUNTING-enabled tables
+    ///   • "account" (required, non-null slash-delimited account string) on
+    ///   ACCOUNTING-enabled tables
     ///
     /// Type expectations by SQL type:
     ///
@@ -112,6 +113,7 @@ pub struct PutTableDataRequest {
     #[prost(int64, tag = "3")]
     pub id: i64,
     /// Required. Columns to update (same typing rules as PostTableDataRequest.data).
+    /// "account" may be omitted, but cannot be null when supplied.
     ///
     /// Special script rules:
     ///
diff --git a/server b/server
index d29f1305..2e4342db 160000
--- a/server
+++ b/server
@@ -1 +1 @@
-Subproject commit d29f130523766cf7beb44e478950aca558fa2b23
+Subproject commit 2e4342dbf48b9f9e327bb02e98aa7627ad6c7d0a