Celtic have had their home fixture with St Mirren postponed due to the Scottish Cup semi-final with Aberdeen.
The SPFL say a rearranged date will be announced for the match in due course.
Neil Lennon's men will face Aberdeen in the last four clash on the weekend of Saturday 31 October and Sunday 1 November. The final of the 2019/20 tournament will take place just before Christmas – on 20 December.
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Hibs will play Hearts in the other semi-final, which exact dates and kick-off times yet to be confirmed.
As a result Hibs' home match with St Johnstone, scheduled for the weekend Saturday October 31, has been postponed, along with Aberdeen's trip to face Hamilton Accies.
