After using two time selection boxes, element can choose the time when the first one is assigned a default value, and why not the second one.

problem description

I use two time selection boxes here, the first one to re-assign the default value of time after use, no problem to choose, but not the second one. Why

related codes

/ / Please paste the code text below (do not replace the code with pictures)
< el-form-item label= "start time" required >

                        <el-col :span="11">
                            <el-form-item prop="createTimeData">
                                <el-date-picker type="date"
                                                placeholder=""
                                                v-model="ruleForm.createTimeData"
                                                style="width: 100%;">

                                </el-date-picker>
                            </el-form-item>
                        </el-col>
                        <el-col class="line" :span="2">-</el-col>
                        <el-col :span="11">
                            <el-form-item prop="createTimeSecond">
                                <el-time-picker type="date" placeholder=""
                                                v-model="ruleForm.createTimeSecond"
                                                style="width: 100%;">

                                </el-time-picker>
                            </el-form-item>
                        </el-col>
                    </el-form-item>

                    <el-form-item label="" required>
                        <el-col :span="11">
                            <el-form-item prop="endTimeData">
                                <el-date-picker type="date"
                                                placeholder=""
                                                v-model="ruleForm.endTimeData"
                                                style="width: 100%;">

                                </el-date-picker>
                            </el-form-item>
                        </el-col>
                        <el-col class="line" :span="2">-</el-col>
                        <el-col :span="11">
                            <el-form-item prop="endTimeSecond">
                                <el-time-picker type="date" placeholder=""
                                                v-model="ruleForm.endTimeSecond"
                                                style="width: 100%;"
                                                @change="endTimeStyle">

                                </el-time-picker>
                            </el-form-item>
                        </el-col>
                    </el-form-item>

meetData (val) {

            this.ruleForm.name = val.name;
            this.ruleForm.id = val.id;
            let dateTime = val.startTime;
            let endTime = val.stopTime;

            console.log("",dateTime , endTime);

            var d = new Date(dateTime);
            console.log("d",d)
            this.ruleForm.createTimeData = d;
            this.ruleForm.createTimeSecond = d;


            var b = new Date(endTime);
            // 
            console.log("",b);
            this.ruleForm.endTimeData = b;
            this.ruleForm.endTimeSecond = b;

            this.ruleForm.meetData = [ val.venueName , val.floorName, val.conferenceName]
        }

what result do you expect?

the time can be selected after reassignment

here is the picture

what result do you expect? What is the error message actually seen?

Aug.27,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3911b-2c16a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3911b-2c16a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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