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this is clearly a version mismatch, you try to build latest master branch of opencv_contrib with opencv3.4.4 main.

(some modules were moved from main to contrib, that's why you have duplicates, now) so,

• either update you main opencv to master branch, too,
• or use the 3.4.4 release from opencv_contrib.

again both repos need to have the exact same version !

this is clearly a version mismatch, you try to build latest master branch of opencv_contrib with opencv3.4.4 main.

(some modules were moved from main to contrib, that's why you have duplicates, now) so,

• either update you main opencv to master branch, too,too (this will remove the duplicates in main)
• or use the 3.4.4 release from opencv_contrib.opencv_contrib (it does not have the duplicates).

again both repos need to have the exact same version !

this is clearly a version mismatch, you try to build latest master branch of opencv_contrib with opencv3.4.4 main.

(some modules were moved from main to contrib, contrib in opencv4, that's why you have duplicates, now) so,

• either update you main opencv to master branch, too (this will remove the duplicates in main)
• or use the 3.4.4 release from opencv_contrib (it does not have the duplicates).

again both repos need to have the exact same version !

this is clearly a version mismatch, you try to build latest master branch of opencv_contrib with opencv3.4.4 main.

(some modules were moved from main to contrib in opencv4, that's why you have duplicates, now) so,

• either update you your main opencv to master branch, too (this will remove the duplicates in main)
• or use the 3.4.4 release from opencv_contrib (it does not have the duplicates).

again both repos need to have the exact same version !