diff --git a/monkey/monkey_island/cc/models/agent.py b/monkey/monkey_island/cc/models/agent.py
index a185e4339..c2833885a 100644
--- a/monkey/monkey_island/cc/models/agent.py
+++ b/monkey/monkey_island/cc/models/agent.py
@@ -17,6 +17,6 @@ class Agent(MutableInfectionMonkeyBaseModel):
     machine_id: MachineID = Field(..., allow_mutation=False)
     start_time: datetime = Field(..., allow_mutation=False)
     stop_time: Optional[datetime]
-    parent_id: AgentID = Field(..., allow_mutation=False)
+    parent_id: Optional[AgentID] = Field(allow_mutation=False)
     cc_server: str = Field(default="")
     log_contents: str = Field(default="")
diff --git a/monkey/tests/unit_tests/monkey_island/cc/models/test_agent.py b/monkey/tests/unit_tests/monkey_island/cc/models/test_agent.py
index 1851a4873..fb528fd51 100644
--- a/monkey/tests/unit_tests/monkey_island/cc/models/test_agent.py
+++ b/monkey/tests/unit_tests/monkey_island/cc/models/test_agent.py
@@ -31,8 +31,11 @@ def test_constructor__defaults_from_objects():
 
 
 def test_constructor__defaults_from_simple_dict():
-    a = Agent(**AGENT_SIMPLE_DICT)
+    agent_simple_dict = AGENT_SIMPLE_DICT.copy()
+    del agent_simple_dict["parent_id"]
+    a = Agent(**agent_simple_dict)
 
+    assert a.parent_id is None
     assert a.stop_time is None
     assert a.cc_server == ""
     assert a.log_contents == ""