diff --git a/integration_test/tests/generating.rs b/integration_test/tests/generating.rs
index 6e6556b2..d4b13e1e 100644
--- a/integration_test/tests/generating.rs
+++ b/integration_test/tests/generating.rs
@@ -29,15 +29,17 @@ fn generating__generate_block__modelled() {
     {
         // No `submit` argument
         json = node.client.generate_block(&mining_addr.to_string(), &transactions).expect("generateblock");
+        let model: Result<mtype::GenerateBlock, _> = json.into_model();
+        model.unwrap();
     }
 
     #[cfg(not(feature = "v24_and_below"))]
     {
         // Check with `submit = false` so that `hex` is returned. v25 and later only.
         json = node.client.generate_block(&mining_addr.to_string(), &transactions, false).expect("generateblock");
+        let model: Result<mtype::GenerateBlock, GenerateBlockError> = json.into_model();
+        model.unwrap();
     }
-    let model: Result<mtype::GenerateBlock, GenerateBlockError> = json.into_model();
-    model.unwrap();
 }
 
 #[test]
diff --git a/types/src/v21/generating/error.rs b/types/src/v21/generating/error.rs
deleted file mode 100644
index 1a5f82ab..00000000
--- a/types/src/v21/generating/error.rs
+++ /dev/null
@@ -1,35 +0,0 @@
-// SPDX-License-Identifier: CC0-1.0
-
-use core::fmt;
-
-use bitcoin::hex;
-
-use crate::error::write_err;
-
-/// Error when converting a `GenerateBlock` type into the model type.
-#[derive(Debug)]
-pub enum GenerateBlockError {
-    /// Conversion of the `hash` field failed.
-    Hash(hex::HexToArrayError),
-}
-
-impl fmt::Display for GenerateBlockError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        use GenerateBlockError::*;
-
-        match *self {
-            Hash(ref e) => write_err!(f, "conversion of the `hash` field failed"; e),
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-impl std::error::Error for GenerateBlockError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
-        use GenerateBlockError::*;
-
-        match *self {
-            Hash(ref e) => Some(e),
-        }
-    }
-}
diff --git a/types/src/v21/generating/into.rs b/types/src/v21/generating/into.rs
index 9b766465..a0c79ac2 100644
--- a/types/src/v21/generating/into.rs
+++ b/types/src/v21/generating/into.rs
@@ -4,17 +4,15 @@
 //!
 //! Types for methods found under the `== Generating ==` section of the API docs.
 
-use bitcoin::BlockHash;
+use bitcoin::{hex, BlockHash};
 
-use super::{GenerateBlock, GenerateBlockError};
+use super::GenerateBlock;
 use crate::model;
 
 impl GenerateBlock {
     /// Converts version specific type to a version nonspecific, more strongly typed type.
-    pub fn into_model(self) -> Result<model::GenerateBlock, GenerateBlockError> {
-        use GenerateBlockError as E;
-
-        let hash = self.hash.parse::<BlockHash>().map_err(E::Hash)?;
+    pub fn into_model(self) -> Result<model::GenerateBlock, hex::HexToArrayError> {
+        let hash = self.hash.parse::<BlockHash>()?;
         Ok(model::GenerateBlock {
             hash,
             hex: None, // v25 and later only.
diff --git a/types/src/v21/generating/mod.rs b/types/src/v21/generating/mod.rs
index 1443d6df..babd5f3c 100644
--- a/types/src/v21/generating/mod.rs
+++ b/types/src/v21/generating/mod.rs
@@ -4,13 +4,10 @@
 //!
 //! Types for methods found under the `== Generating ==` section of the API docs.
 
-mod error;
 mod into;
 
 use serde::{Deserialize, Serialize};
 
-pub use self::error::GenerateBlockError;
-
 /// Result of JSON-RPC method `generateblock`.
 ///
 /// > Mine a block with a set of ordered transactions immediately to a specified address or descriptor (before the RPC call returns)
diff --git a/types/src/v21/mod.rs b/types/src/v21/mod.rs
index f35ceadd..7844fe31 100644
--- a/types/src/v21/mod.rs
+++ b/types/src/v21/mod.rs
@@ -244,7 +244,7 @@ pub use self::{
         Bip9SoftforkInfo, GetBlockchainInfo, GetMempoolEntry, GetMempoolInfo, Softfork,
         SoftforkType,
     },
-    generating::{GenerateBlock, GenerateBlockError},
+    generating::GenerateBlock,
     network::{GetNetworkInfo, GetPeerInfo},
     util::{GetIndexInfo, GetIndexInfoName},
     wallet::{
diff --git a/types/src/v22/mod.rs b/types/src/v22/mod.rs
index 10efbccd..b640d43f 100644
--- a/types/src/v22/mod.rs
+++ b/types/src/v22/mod.rs
@@ -306,10 +306,9 @@ pub use crate::{
     },
     v20::{CreateMultisig, GenerateToDescriptor, GetTransaction, GetTransactionDetail},
     v21::{
-        Bip9SoftforkInfo, GenerateBlock, GenerateBlockError, GetBlockchainInfo, GetIndexInfo,
-        GetIndexInfoName, GetMempoolEntry, GetNetworkInfo, ImportDescriptors,
-        ImportDescriptorsResult, PsbtBumpFee, PsbtBumpFeeError, Send, SendError, Softfork,
-        SoftforkType, UnloadWallet, UpgradeWallet,
+        Bip9SoftforkInfo, GenerateBlock, GetBlockchainInfo, GetIndexInfo, GetIndexInfoName,
+        GetMempoolEntry, GetNetworkInfo, ImportDescriptors, ImportDescriptorsResult, PsbtBumpFee,
+        PsbtBumpFeeError, Send, SendError, Softfork, SoftforkType, UnloadWallet, UpgradeWallet,
     },
     ScriptPubkey,
 };
diff --git a/types/src/v23/mod.rs b/types/src/v23/mod.rs
index 8544c252..69d186f4 100644
--- a/types/src/v23/mod.rs
+++ b/types/src/v23/mod.rs
@@ -306,9 +306,9 @@ pub use crate::{
     },
     v20::{GenerateToDescriptor, GetTransactionDetail},
     v21::{
-        GenerateBlock, GenerateBlockError, GetIndexInfo, GetIndexInfoName, GetNetworkInfo,
-        ImportDescriptors, ImportDescriptorsResult, PsbtBumpFee, PsbtBumpFeeError, Send, SendError,
-        UnloadWallet, UpgradeWallet,
+        GenerateBlock, GetIndexInfo, GetIndexInfoName, GetNetworkInfo, ImportDescriptors,
+        ImportDescriptorsResult, PsbtBumpFee, PsbtBumpFeeError, Send, SendError, UnloadWallet,
+        UpgradeWallet,
     },
     v22::{Banned, GetMempoolInfo, ListBanned, ScriptPubkey},
 };
diff --git a/types/src/v24/mod.rs b/types/src/v24/mod.rs
index 53226872..47809210 100644
--- a/types/src/v24/mod.rs
+++ b/types/src/v24/mod.rs
@@ -307,9 +307,9 @@ pub use crate::{
     },
     v20::GenerateToDescriptor,
     v21::{
-        GenerateBlock, GenerateBlockError, GetIndexInfo, GetIndexInfoName, GetNetworkInfo,
-        ImportDescriptors, ImportDescriptorsResult, PsbtBumpFee, PsbtBumpFeeError, Send, SendError,
-        UnloadWallet, UpgradeWallet,
+        GenerateBlock, GetIndexInfo, GetIndexInfoName, GetNetworkInfo, ImportDescriptors,
+        ImportDescriptorsResult, PsbtBumpFee, PsbtBumpFeeError, Send, SendError, UnloadWallet,
+        UpgradeWallet,
     },
     v22::{Banned, ListBanned, ScriptPubkey},
     v23::{