diff --git a/aws_lambda_powertools/utilities/idempotency/persistence/dynamodb.py b/aws_lambda_powertools/utilities/idempotency/persistence/dynamodb.py
index 8a470c0f910..88955738ecc 100644
--- a/aws_lambda_powertools/utilities/idempotency/persistence/dynamodb.py
+++ b/aws_lambda_powertools/utilities/idempotency/persistence/dynamodb.py
@@ -22,7 +22,7 @@ def __init__(
         self,
         table_name: str,
         key_attr: str = "id",
-        static_pk_value: str = f"idempotency#{os.getenv(constants.LAMBDA_FUNCTION_NAME_ENV, '')}",
+        static_pk_value: Optional[str] = None,
         sort_key_attr: Optional[str] = None,
         expiry_attr: str = "expiration",
         status_attr: str = "status",
@@ -76,6 +76,9 @@ def __init__(
         if sort_key_attr == key_attr:
             raise ValueError(f"key_attr [{key_attr}] and sort_key_attr [{sort_key_attr}] cannot be the same!")
 
+        if static_pk_value is None:
+            static_pk_value = f"idempotency#{os.getenv(constants.LAMBDA_FUNCTION_NAME_ENV, '')}"
+
         self._table = None
         self.table_name = table_name
         self.key_attr = key_attr
diff --git a/poetry.lock b/poetry.lock
index fd6fb30fe39..f9fdb717c27 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -243,7 +243,7 @@ toml = "*"
 
 [[package]]
 name = "flake8-bugbear"
-version = "22.1.11"
+version = "22.4.25"
 description = "A plugin for flake8 finding likely bugs and design problems in your program. Contains warnings that don't belong in pyflakes and pycodestyle."
 category = "dev"
 optional = false
@@ -1057,7 +1057,7 @@ pydantic = ["pydantic", "email-validator"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6.2"
-content-hash = "a9e5a39785a1220fb8289aed562d50c7d9112d8437b6d5b1bd561f3064d5ae26"
+content-hash = "cf8b7764b84b398aeca74c548ad9872294a4f772ea1b1a93899ac6d70b2ef2b6"
 
 [metadata.files]
 atomicwrites = [
@@ -1181,8 +1181,8 @@ flake8-black = [
     {file = "flake8_black-0.2.3-py3-none-any.whl", hash = "sha256:cc080ba5b3773b69ba102b6617a00cc4ecbad8914109690cfda4d565ea435d96"},
 ]
 flake8-bugbear = [
-    {file = "flake8-bugbear-22.1.11.tar.gz", hash = "sha256:4c2a4136bd4ecb8bf02d5159af302ffc067642784c9d0488b33ce4610da825ee"},
-    {file = "flake8_bugbear-22.1.11-py3-none-any.whl", hash = "sha256:ce7ae44aaaf67ef192b8a6de94a5ac617144e1675ad0654fdea556f48dc18d9b"},
+    {file = "flake8-bugbear-22.4.25.tar.gz", hash = "sha256:f7c080563fca75ee6b205d06b181ecba22b802babb96b0b084cc7743d6908a55"},
+    {file = "flake8_bugbear-22.4.25-py3-none-any.whl", hash = "sha256:ec374101cddf65bd7a96d393847d74e58d3b98669dbf9768344c39b6290e8bd6"},
 ]
 flake8-builtins = [
     {file = "flake8-builtins-1.5.3.tar.gz", hash = "sha256:09998853b2405e98e61d2ff3027c47033adbdc17f9fe44ca58443d876eb00f3b"},
diff --git a/pyproject.toml b/pyproject.toml
index 0ccfb46e2b2..83db461cebb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,7 @@ bandit = "^1.7.1"
 radon = "^5.1.0"
 xenon = "^0.9.0"
 flake8-eradicate = "^1.2.1"
-flake8-bugbear = "^22.1.11"
+flake8-bugbear = "^22.4.25"
 mkdocs-git-revision-date-plugin = "^0.3.2"
 mike = "^0.6.0"
 mypy = "^0.950"