diff --git a/planetmint/backend/tarantool/query.py b/planetmint/backend/tarantool/query.py
index d866afb..3773a19 100644
--- a/planetmint/backend/tarantool/query.py
+++ b/planetmint/backend/tarantool/query.py
@@ -8,6 +8,8 @@
 from secrets import token_hex
 from operator import itemgetter
 
+import tarantool.error
+
 from planetmint.backend import query
 from planetmint.backend.utils import module_dispatch_registrar
 from planetmint.backend.tarantool.connection import TarantoolDB
@@ -377,12 +379,17 @@ def store_pre_commit_state(connection, state: dict):
 
 @register_query(TarantoolDB)
 def get_pre_commit_state(connection):
-    space = connection.space("pre_commits")
-    _commit = space.select([], index="id_search").data
-    if len(_commit) == 0:
+    try:
+        space = connection.space("pre_commits")
+        _commit = space.select([], index="id_search").data
+        if len(_commit) == 0:
+            return None
+        _commit = sorted(_commit, key=itemgetter(1), reverse=True)[0]
+        return {"height": _commit[1], "transactions": _commit[2]}
+    except tarantool.error.SchemaError:
         return None
-    _commit = sorted(_commit, key=itemgetter(1), reverse=True)[0]
-    return {"height": _commit[1], "transactions": _commit[2]}
+    except Exception as err:
+        raise err
 
 
 @register_query(TarantoolDB)
diff --git a/planetmint/backend/tarantool/schema.py b/planetmint/backend/tarantool/schema.py
index 070f8c5..224c67b 100644
--- a/planetmint/backend/tarantool/schema.py
+++ b/planetmint/backend/tarantool/schema.py
@@ -9,7 +9,7 @@ register_schema = module_dispatch_registrar(backend.schema)
 
 SPACE_NAMES = ("abci_chains", "assets", "blocks", "blocks_tx",
                "elections", "meta_data", "pre_commits", "validators",
-               "transactions", "inputs", "outputs", "keys")
+               "transactions", "inputs", "outputs", "keys", "utxos")
 
 SPACE_COMMANDS = {
     "abci_chains": "abci_chains = box.schema.space.create('abci_chains', {engine='memtx', is_sync = false})",
diff --git a/planetmint/lib.py b/planetmint/lib.py
index 1297e94..0de282a 100644
--- a/planetmint/lib.py
+++ b/planetmint/lib.py
@@ -513,4 +513,5 @@ class Planetmint(object):
         return backend.query.delete_elections(self.connection, height)
 
 
+
 Block = namedtuple('Block', ('app_hash', 'height', 'transactions'))
diff --git a/requirements_old.txt b/requirements_old.txt
deleted file mode 100644
index 4b26d68..0000000
--- a/requirements_old.txt
+++ /dev/null
@@ -1,64 +0,0 @@
-aiohttp==3.6.2
-aniso8601==9.0.1
-asn1crypto==1.4.0
-async-timeout==3.0.1
-attrs==21.4.0
-base58==1.0.3
-BigchainDB==2.2.2
-bigchaindb-abci==1.0.5
-capturer==3.0
-certifi==2021.10.8
-cffi==1.15.0
-chardet==3.0.4
-charset-normalizer==2.0.12
-click==8.0.3
-colorlog==4.1.0
-cryptoconditions==0.8.0
-cryptography==36.0.1
-Flask==1.1.2
-Flask-Cors==3.0.8
-Flask-RESTful==0.3.8
-gevent==20.6.2
-greenlet==0.4.16
-gunicorn==20.0.4
-humanfriendly==10.0
-hypothesis==6.39.3
-idna==2.10
-iniconfig==1.1.1
-itsdangerous==2.0.1
-Jinja2==3.0.3
-jsonschema==3.2.0
-logstats==0.3.0
-MarkupSafe==2.0.1
-msgpack==1.0.3
-multidict==4.7.6
-packaging==21.3
-Planetmint==0.9.0
-planetmint-cryptoconditions==0.9.3
-pluggy==1.0.0
-protobuf==3.6.1
-py==1.11.0
-pyasn1==0.4.8
-pycparser==2.21
-pymongo==3.7.2
-PyNaCl==1.1.2
-pyOpenSSL==22.0.0
-pyparsing==3.0.7
-pyrsistent==0.18.1
-pytest==7.0.1
-python-rapidjson==0.9.1
-pytz==2021.3
-PyYAML==5.3.1
-requests==2.23.0
-setproctitle==1.1.10
-six==1.16.0
-sortedcontainers==2.4.0
-tarantool==0.7.1
-tomli==2.0.1
-typing_extensions==4.1.1
-urllib3==1.25.11
-Werkzeug==2.0.3
-yarl==1.7.2
-zenroom==2.1.0.dev1647359536
-zope.event==4.5.0
-zope.interface==5.5.0.dev0
diff --git a/tests/commands/test_commands.py b/tests/commands/test_commands.py
index 73c7dd3..a269c5d 100644
--- a/tests/commands/test_commands.py
+++ b/tests/commands/test_commands.py
@@ -20,7 +20,6 @@ from planetmint.migrations.chain_migration_election import ChainMigrationElectio
 
 from tests.utils import generate_election, generate_validators
 
-
 def test_make_sure_we_dont_remove_any_command():
     # thanks to: http://stackoverflow.com/a/18161115/597097
     from planetmint.commands.planetmint import create_parser