Sky has apologised after an episode of Game of Thrones was shown before the watershed without pin protection in place.
The hit fantasy series was known throughout its run for its explicit scenes of sex and violence as well as its colourful use of language.
In the UK, shows which feature certain content are not allowed to air before 9pm with material not suitable for children usually not shown before this time.
An episode of Game of Thrones was shown on 19 August at 7:35am on Sky Atlantic with viewers not needing to enter a pin code to watch it.
The episode featured numerous instances of bad language and the incident has been blamed on a technical fault as a result of a software update that accidentally removed the pin protection.
Sky said that it "fully accepts strong content should not be broadcast before the watershed without the necessary mandatory PIN protection".
The media conglomerate also apologised "to those customers who viewed this content".
They added: "It is never our intention to offend or upset our viewers."
Martin said recently: "It seems as though Emilia Clarke has already mentioned that Snow was Kit’s idea in a recent interview. So that part is out. Yes, it was Kit Harington who brought the idea to us."
It would be the second Game of Thrones spin-off after House of the Dragon which premiered earlier this year to rave reviews and large viewing figures.
The show was recently nominated for two Golden Globes including Best TV Drama and Best Actress in a TV Drama for Emma D'Arcy's portrayal of Princess Rhaenyra Targaryen.
The second season of the show is expected to enter production in 2023.
Watch below: Kit Harington aims to get out of his comfort zone with roles that "scare" him