Crontab spawning multiple instances of task instead of a single instance

I have a python script which needs to run every 5 minutes. I am calling this script via a bash file named activate.sh:

#!/bin/bash
../../env/bin/python3 ./run.py

Then to run this task every 5 minutes, I have a crontab job configured as such:

*/5 * * * * cd /var/www/usa/api/BackgroundTasks && /bin/bash ./activate.sh

I have literally the same setup running on 3 different servers 2 of which work just fine and activate the task only once. The one on the USA server however spawns multiple instances of run.py. This went so far that it nearly filled up the entire memory causing performance issues.

Here is the app.py code but I don’t think the issue is there, I think the issue is with cron itself:

import time, sys, os, datetime
try:
    sys.path.append("../")

    from Flabstraction.Flabstraction import Pysqlalchemy, MailingService
    from Flabstraction.constants import constants_dict

    from AutomatedReports import schedules_builder_2
    from DeleteOldJobs import delete_old_jobs
    from StallTimers import stop_timers

    constants_selector = "LOCAL"
    path_to_self = os.getcwd()
    selectors = ['/au/','/eu/','/nz/','/usa/','/demo/']
    for sel in selectors:
        if sel in path_to_self:
            constants_selector = sel.upper().replace('/', '')
            break
    constants = constants_dict[constants_selector]

    mail = MailingService()
    sql = Pysqlalchemy('mysql+pymysql', constants["mysql_user"], constants["mysql_pw"], constants["server_ip"], constants["mysql_db"])

    file = open('./background.log', 'w')
    file.write(str(datetime.datetime.now()) + " : running started. n")

    if constants_selector in ["LOCAL", "US"]:
        schedules_builder_2(sql, constants["timezone"], constants_selector, mail, constants)    
    if constants_selector in ["AU", "NZ", "EU"]:
        delete_old_jobs(sql, constants["timezone"])

    stop_timers(sql, constants["timezone"], constants["_instance_id"])

    file.write(str(datetime.datetime.now()) + " : running stapped. n")
    file.close()

    except Exception as e:
        file = open("./background.log", "w")
        file.write("Error occured: ", e)
        file.close()
        raise e

Any idea how to resolve this and why it would be happening on only 1 of 3 servers?