diff --git a/api/chalicelib/core/sourcemaps.py b/api/chalicelib/core/sourcemaps.py
index 147304a4e..886198e35 100644
--- a/api/chalicelib/core/sourcemaps.py
+++ b/api/chalicelib/core/sourcemaps.py
@@ -148,10 +148,7 @@ MAX_COLUMN_OFFSET = 60
 def fetch_missed_contexts(frames):
     source_cache = {}
     for i in range(len(frames)):
-        print(">>>>>>>> fetch_missed_contexts exception:")
-        print(frames[i])
-        print("------------------")
-        if len(frames[i]["context"]) > 0:
+        if frames[i] and frames[i].get("context") and len(frames[i]["context"]) > 0:
             continue
         file_abs_path = frames[i]["frame"]["absPath"]
         if file_abs_path in source_cache:
diff --git a/api/env.default b/api/env.default
index 64243ed0b..82419328c 100644
--- a/api/env.default
+++ b/api/env.default
@@ -49,4 +49,5 @@ SESSION_MOB_PATTERN_E=%(sessionId)s/dom.mobe
 DEVTOOLS_MOB_PATTERN=%(sessionId)s/devtools.mobs
 PRESIGNED_URL_EXPIRATION=3600
 ASSIST_JWT_EXPIRATION=144000
-ASSIST_JWT_SECRET=
\ No newline at end of file
+ASSIST_JWT_SECRET=
+PYTHONUNBUFFERED=1
\ No newline at end of file
diff --git a/ee/scripts/schema/db/init_dbs/postgresql/1.8.2/1.8.2.sql b/ee/scripts/schema/db/init_dbs/postgresql/1.8.2/1.8.2.sql
index 9742cd426..a144f3a1d 100644
--- a/ee/scripts/schema/db/init_dbs/postgresql/1.8.2/1.8.2.sql
+++ b/ee/scripts/schema/db/init_dbs/postgresql/1.8.2/1.8.2.sql
@@ -60,6 +60,7 @@ BEGIN
 END;
 $$ LANGUAGE plpgsql;
 
-ALTER TABLE sessions ADD file_key BYTEA NULL;
+ALTER TABLE IF EXISTS sessions
+    ADD COLUMN IF NOT EXISTS file_key BYTEA DEFAULT NULL;
 
 COMMIT;
\ No newline at end of file
diff --git a/ee/scripts/schema/db/init_dbs/postgresql/init_schema.sql b/ee/scripts/schema/db/init_dbs/postgresql/init_schema.sql
index a3d403b44..866a0e7d5 100644
--- a/ee/scripts/schema/db/init_dbs/postgresql/init_schema.sql
+++ b/ee/scripts/schema/db/init_dbs/postgresql/init_schema.sql
@@ -545,11 +545,12 @@ $$
                 watchdogs_score         bigint       NOT NULL DEFAULT 0,
                 issue_score             bigint       NOT NULL DEFAULT 0,
                 issue_types             issue_type[] NOT NULL DEFAULT '{}'::issue_type[],
-                utm_source              text         NULL     DEFAULT NULL,
-                utm_medium              text         NULL     DEFAULT NULL,
-                utm_campaign            text         NULL     DEFAULT NULL,
-                referrer                text         NULL     DEFAULT NULL,
-                base_referrer           text         NULL     DEFAULT NULL,
+                utm_source              text                  DEFAULT NULL,
+                utm_medium              text                  DEFAULT NULL,
+                utm_campaign            text                  DEFAULT NULL,
+                referrer                text                  DEFAULT NULL,
+                base_referrer           text                  DEFAULT NULL,
+                file_key                bytea                 DEFAULT NULL,
                 metadata_1              text                  DEFAULT NULL,
                 metadata_2              text                  DEFAULT NULL,
                 metadata_3              text                  DEFAULT NULL,