diff --git a/aurora/importers/aurora.py b/aurora/importers/aurora.py
index 44cab98..29d153e 100644
--- a/aurora/importers/aurora.py
+++ b/aurora/importers/aurora.py
@@ -62,7 +62,12 @@ class ImportAuroraView(ui.View):
                     case["target_type"] = "USER"
 
             if "role_id" not in case or not case["role_id"]:
-                case["role_id"] = 0
+                case["role_id"] = None
+            else:
+                case["role_id"] = int(case["role_id"])
+
+            case["target_id"] = int(case["target_id"])
+            case["moderator_id"] = int(case["moderator_id"])
 
             if "changes" not in case or not case["changes"]:
                 case["changes"] = []
@@ -74,11 +79,11 @@ class ImportAuroraView(ui.View):
             if not metadata.get("imported_from"):
                 metadata.update({"imported_from": "Aurora"})
 
-            if case["duration"] != "NULL":
+            if case["duration"] != "NULL" and case["duration"] is not None:
                 hours, minutes, seconds = map(int, case["duration"].split(":"))
                 duration = timedelta(hours=hours, minutes=minutes, seconds=seconds)
             else:
-                duration = "NULL"
+                duration = None
 
             await mysql_log(
                 self.ctx.guild.id,
diff --git a/aurora/models.py b/aurora/models.py
index d93c025..c4013cb 100644
--- a/aurora/models.py
+++ b/aurora/models.py
@@ -75,4 +75,8 @@ class JSONEncoder(json.JSONEncoder):
             return int(o.timestamp())
         if isinstance(o, timedelta):
             return str(o)
+        if isinstance(o, Moderation):
+            return o.model_dump()
+        if isinstance(o, None):
+            return "NULL"
         return super().default(o)
diff --git a/aurora/utilities/database.py b/aurora/utilities/database.py
index a2bcb92..95ad7c8 100644
--- a/aurora/utilities/database.py
+++ b/aurora/utilities/database.py
@@ -8,8 +8,7 @@ from discord import Guild
 from redbot.core import data_manager
 
 from .logger import logger
-from .utils import (convert_timedelta_to_str, generate_dict,
-                    get_next_case_number)
+from .utils import convert_timedelta_to_str, generate_dict, get_next_case_number
 
 
 def connect() -> sqlite3.Connection:
@@ -42,9 +41,9 @@ async def create_guild_table(guild: Guild):
                 timestamp INTEGER NOT NULL,
                 moderation_type TEXT NOT NULL,
                 target_type TEXT NOT NULL,
-                target_id TEXT NOT NULL,
-                moderator_id TEXT NOT NULL,
-                role_id TEXT,
+                target_id INTEGER NOT NULL,
+                moderator_id INTEGER NOT NULL,
+                role_id INTEGER,
                 duration TEXT,
                 end_timestamp INTEGER,
                 reason TEXT,
@@ -52,8 +51,8 @@ async def create_guild_table(guild: Guild):
                 resolved_by TEXT,
                 resolve_reason TEXT,
                 expired INTEGER NOT NULL,
-                changes TEXT NOT NULL,
-                metadata TEXT NOT NULL
+                changes JSON NOT NULL,
+                metadata JSON NOT NULL
             )
         """
         cursor.execute(query)
@@ -111,8 +110,8 @@ async def mysql_log(
     target_type: str,
     target_id: int,
     role_id: int,
-    duration: timedelta,
-    reason: str,
+    duration: timedelta = None,
+    reason: str = None,
     database: sqlite3.Connection = None,
     timestamp: int = None,
     resolved: bool = False,
@@ -125,13 +124,14 @@ async def mysql_log(
     if not timestamp:
         timestamp = int(time.time())
 
-    if duration != "NULL":
+    if duration != "NULL" and duration is not None:
         end_timedelta = datetime.fromtimestamp(timestamp) + duration
         end_timestamp = int(end_timedelta.timestamp())
 
         duration = convert_timedelta_to_str(duration)
     else:
-        end_timestamp = 0
+        duration = None
+        end_timestamp = None
 
     if not expired:
         if int(time.time()) > end_timestamp:
@@ -139,11 +139,17 @@ async def mysql_log(
         else:
             expired = 0
 
-    if resolved_by is None:
-        resolved_by = "NULL"
+    if reason == "NULL":
+        reason = None
 
-    if resolved_reason is None:
-        resolved_reason = "NULL"
+    if resolved_by == "NULL":
+        resolved_by = None
+
+    if resolved_reason == "NULL":
+        resolved_reason = None
+
+    if role_id == 0:
+        role_id = None
 
     if not database:
         database = connect()