delete states if it exists on run (#3901)

* delete states if it exists

* simplify ImmutableComputedVar.__get__ (#3902)

* simplify ImmutableComputedVar.__get__

* ruff it

---------

Co-authored-by: benedikt-bartscher <31854409+benedikt-bartscher@users.noreply.github.com>

reflex/reflex.py

@@ -16,6 +16,7 @@ from reflex_cli.utils import dependency
 from reflex import constants
 from reflex.config import get_config
 from reflex.custom_components.custom_components import custom_components_cli
+from reflex.state import reset_disk_state_manager
 from reflex.utils import console, redir, telemetry
 
 # Disable typer+rich integration for help panels
@@ -180,6 +181,9 @@ def _run(
     if prerequisites.needs_reinit(frontend=frontend):
         _init(name=config.app_name, loglevel=loglevel)
 
+    # Delete the states folder if it exists.
+    reset_disk_state_manager()
+
     # Find the next available open port if applicable.
     if frontend:
         frontend_port = processes.handle_port(

reflex/state.py

@@ -2499,6 +2499,14 @@ def state_to_schema(
     )
 
 
+def reset_disk_state_manager():
+    """Reset the disk state manager."""
+    states_directory = prerequisites.get_web_dir() / constants.Dirs.STATES
+    if states_directory.exists():
+        for path in states_directory.iterdir():
+            path.unlink()
+
+
 class StateManagerDisk(StateManager):
     """A state manager that stores states in memory."""