Why the Detected read1 adapter and Detected read2 adapter are same?

[permia]

In the summary html, both Detected read1 adapter and Detected read2 adapter are AGATCGGAAGAGCACACGTCTGAACTCCAGTCA ->Illumina TruSeq Adapter Read 1. Is the reason that the sequncing company only using one adapter?

fastp \
--thread $threads \
-i "${read1}" \
-I "${read2}" \
-o "${output_dir}"/"${fastq_name}"_trim_1.fastq.gz \
-O "${output_dir}"/"${fastq_name}"_trim_2.fastq.gz \
-j "${output_dir}"/"${fastq_name}"_fastp.json \
-h "${output_dir}"/"${fastq_name}"_fastp.html \
--dont_overwrite \
--detect_adapter_for_pe \
--trim_poly_g \
--length_required 36