I dont know why my function won't work?

[MehHz2526]

purchase = 1
def write():
    shop =input("What shop did you shop at?")
    sipCard =int(input("What is your sip card?"))
    sipCardexipirationDate = int(input("please write the years left before the expiry date (to the nearest year) "))
    cost =float(input("Please enter the total cost of the shop you have shopped at"))
             
#monthly record
    with open ("MonthlyRecord.txt","w")as f:
        f.write ("shop:"+str(shop))
        f.write (" ; ")
        f.write ("SIP:"+str(sipCard))
        f.write (" ; ")
        f.write ("expiry:"+str(sipCardexipirationDate))
        f.write (" ; ")
        f.write ("£:"+str(cost))
        f.write ("\n")
        exit
    
    with open ("MonthlyRecord.txt","r") as f:
        print(f.read())
        
     

def read(): 
    lookfor = input ("what is your name?") 
    with open("MonthlyRecord.txt", "r") as f: 
        for line in f.readlines(): 
            sipCard = line.split(" ; ")[0]
            sipCardexipirationDate = int(line.split(" ; ")[1].replace("\n","")) 
            if sipCard == lookfor: 
                print(sipCardexipirationDate) 
                choice = input("pick 1 or 2") 
                if choice == "1": 
                    write() 
                else: 
                    read() 
                    print ("thank you") 
        
        
while purchase <200:            
    write()
    read()

Output:
What shop did you shop at?gucci
What is your sip card?123
please write the years left before the expiry date (to the nearest year) 2
Please enter the total cost of the shop you have shopped at123.45
shop:gucci ; SIP:123 ; expiry:2 ; £:123.45

what is your name?mehri

Error:
Traceback (most recent call last):
  File "C:/Users/StaR/AppData/Local/Programs/Python/Python311/file3.py", line 43, in <module>
    read()
  File "C:/Users/StaR/AppData/Local/Programs/Python/Python311/file3.py", line 30, in read
    sipCardexipirationDate = int(line.split(" ; ")[1].replace("\n",""))
ValueError: invalid literal for int() with base 10: 'SIP:123'

Yoriz write Nov-28-2022, 08:59 PM:
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