diff --git a/planetmint/lib.py b/planetmint/lib.py
index e7805da..f44fdcf 100644
--- a/planetmint/lib.py
+++ b/planetmint/lib.py
@@ -947,6 +947,11 @@ class Planetmint(object):
         elections = self._get_votes(txns)
         for election_id in elections:
             election = self.get_transaction(election_id)
-            election.on_rollback(self, new_height)
+            # election.on_rollback(self, new_height)
+            if election.operation == VALIDATOR_ELECTION:
+                # TODO change to `new_height + 2` when upgrading to Tendermint 0.24.0.
+                self.delete_validator_set(new_height + 1)
+            if election.operation == CHAIN_MIGRATION_ELECTION:
+                self.delete_abci_chain(new_height)
 
 Block = namedtuple("Block", ("app_hash", "height", "transactions"))
diff --git a/planetmint/transactions/types/elections/chain_migration_election.py b/planetmint/transactions/types/elections/chain_migration_election.py
index 8c2bbf1..58257d3 100644
--- a/planetmint/transactions/types/elections/chain_migration_election.py
+++ b/planetmint/transactions/types/elections/chain_migration_election.py
@@ -17,6 +17,3 @@ class ChainMigrationElection(Election):
 
     def on_approval(self, planet, *args, **kwargs): # TODO: move somewhere else
         planet.migrate_abci_chain()
-
-    def on_rollback(self, planet, new_height): # TODO: move somewhere else
-        planet.delete_abci_chain(new_height)
diff --git a/planetmint/transactions/types/elections/election.py b/planetmint/transactions/types/elections/election.py
index b72031a..c4773c8 100644
--- a/planetmint/transactions/types/elections/election.py
+++ b/planetmint/transactions/types/elections/election.py
@@ -73,9 +73,3 @@ class Election(Transaction):
         other concluded elections, if required.
         """
         raise NotImplementedError
-
-    def on_rollback(self, planet, new_height):
-        """Override to clean up the database artifacts possibly created
-        in `on_approval`. Part of the `end_block`/`commit` crash recovery.
-        """
-        raise NotImplementedError
diff --git a/planetmint/transactions/types/elections/validator_election.py b/planetmint/transactions/types/elections/validator_election.py
index 6d3bf14..670060c 100644
--- a/planetmint/transactions/types/elections/validator_election.py
+++ b/planetmint/transactions/types/elections/validator_election.py
@@ -31,7 +31,3 @@ class ValidatorElection(Election):
         # TODO change to `new_height + 2` when upgrading to Tendermint 0.24.0.
         planet.store_validator_set(new_height + 1, updated_validator_set)
         return encode_validator(self.asset["data"])
-
-    def on_rollback(self, planetmint, new_height): # TODO: move somewhere else
-        # TODO change to `new_height + 2` when upgrading to Tendermint 0.24.0.
-        planetmint.delete_validator_set(new_height + 1)