diff --git a/object/types.proto b/object/types.proto
index c2e9b71..67e142a 100644
--- a/object/types.proto
+++ b/object/types.proto
@@ -92,8 +92,6 @@ enum MatchType {
 //   payload_hash
 // * $Object:objectType \
 //   object_type
-// * $Object:homomorphicHash \
-//   homomorphic_hash
 // * $Object:split.parent \
 //   object_id of parent
 // * $Object:split.splitID \
@@ -193,6 +191,7 @@ message Header {
   ObjectType object_type = 7 [json_name = "objectType"];
 
   // Homomorphic hash of the object payload (Tillich-Zemor).
+  // DEPRECATED. Objects of 2.23+ version must have it empty.
   neo.fs.v2.refs.Checksum homomorphic_hash = 8 [json_name = "homomorphicHash"];
 
   // Session token, if it was used during Object creation. Need it to verify
diff --git a/proto-docs/object.md b/proto-docs/object.md
index de54de7..591cf50 100644
--- a/proto-docs/object.md
+++ b/proto-docs/object.md
@@ -951,7 +951,7 @@ Object Header
 | payload_length | [uint64](#uint64) |  | Size of payload in bytes. `0xFFFFFFFFFFFFFFFF` means `payload_length` is unknown. |
 | payload_hash | [neo.fs.v2.refs.Checksum](#neo.fs.v2.refs.Checksum) |  | SHA256 hash of payload bytes |
 | object_type | [ObjectType](#neo.fs.v2.object.ObjectType) |  | Type of the object payload content |
-| homomorphic_hash | [neo.fs.v2.refs.Checksum](#neo.fs.v2.refs.Checksum) |  | Homomorphic hash of the object payload (Tillich-Zemor). |
+| homomorphic_hash | [neo.fs.v2.refs.Checksum](#neo.fs.v2.refs.Checksum) |  | Homomorphic hash of the object payload (Tillich-Zemor). DEPRECATED. Objects of 2.23+ version must have it empty. |
 | session_token | [neo.fs.v2.session.SessionToken](#neo.fs.v2.session.SessionToken) |  | Session token, if it was used during Object creation. Need it to verify integrity and authenticity out of Request scope. Only one of `session_token` or `session_token_v2` can be set. |
 | attributes | [Header.Attribute](#neo.fs.v2.object.Header.Attribute) | repeated | User-defined object attributes. Attributes vary in length from object to object, so keep an eye on the entire Header limit depending on the context. |
 | split | [Header.Split](#neo.fs.v2.object.Header.Split) |  | Position of the object in the split hierarchy |
@@ -1098,8 +1098,6 @@ prefix to the name. Here is the list of fields available via this prefix:
   payload_hash
 * $Object:objectType \
   object_type
-* $Object:homomorphicHash \
-  homomorphic_hash
 * $Object:split.parent \
   object_id of parent
 * $Object:split.splitID \
diff --git a/proto-docs/refs.md b/proto-docs/refs.md
index 9630595..d0305a3 100644
--- a/proto-docs/refs.md
+++ b/proto-docs/refs.md
@@ -208,7 +208,7 @@ Checksum algorithm type.
 | Name | Number | Description |
 | ---- | ------ | ----------- |
 | CHECKSUM_TYPE_UNSPECIFIED | 0 | Unknown. Not used |
-| TZ | 1 | Tillich-Zemor homomorphic hash function |
+| TZ | 1 | Tillich-Zemor homomorphic hash function DEPRECATED starting from 2.23 API version. |
 | SHA256 | 2 | SHA-256 |
 
 
diff --git a/refs/types.proto b/refs/types.proto
index 3b7d153..a70f6c2 100644
--- a/refs/types.proto
+++ b/refs/types.proto
@@ -147,6 +147,7 @@ enum ChecksumType {
   CHECKSUM_TYPE_UNSPECIFIED = 0;
 
   // Tillich-Zemor homomorphic hash function
+  // DEPRECATED starting from 2.23 API version.
   TZ = 1;
 
   // SHA-256